Must Be True—Formal Logic. The correct answer choice is (B)
The first premise (the initial part of the first sentence) can be diagrammed as:
- RUG = recent university graduates
WEI = consider work environment an important factor in choosing a job




The second premise (the final part of sentence one) can be diagrammed thus:
- SALI = consider salary an important factor in choosing a job




Because these premises share a common term, RUG, they can be combined:






The inference is that some people who consider work environment to be an important factor in choosing a job also consider salary to be an important factor in choosing a job.
The second sentence introduces two new premises (the third and fourth premises of the stimulus). The third premise is:
- SLI = consider stress level an important factor in choosing a job
VE = veteran employees




This premise does have any shared terms with anything presented thus far, so all that can be inferred is the contrapositive:
VE

The final part of the second sentence (premise four) can be represented as:
- VPI = consider vacation policy an important factor in choosing a job




This fourth premise can be combined with the information from the first sentence:




















There are three inferences that result from this combination:
- 1. WEI

2. WEI

3. SALI

At this point, three strong “some” inferences have been made and one of these will be the correct answer choice.
Answer choice (A): The very first answer choice illustrates the importance of correctly interpreting each clause in the stimulus. Referring back to the first inference made (the combination of the first and second premises in sentence one): there are some people who consider work environment to be an important factor in choosing a job who also consider salary to be an important factor in choosing a job. However, the correct interpretation of that clause means there could be workers who consider work environment important but do not consider salary important (or vice versa).
Answer choice (B): This is the correct answer choice. Diagrammatically this answer choice would be represented as WEI

Answer choice (C): The stimulus does not restrict the range of workers who consider work environment an important factor to just a few recent university graduates. That is, it is possible that all veteran employees consider work environment to be an important factor in choosing a job. In fact, the stimulus does not provide enough information to infer anything about veteran employees except what is explicitly stated – veteran employees are the only employees who consider stress level an important factor in choosing a job (SLI

Answer choice (D): It is true that some people who consider vacation policy an important factor also consider salary an important factor (SALI

Answer choice (E): This answer choice is probably drawn from the fact that all recent university graduates consider salary important and none of them consider stress level important (only veteran employees consider stress level important). However, the veteran employees who do consider stress level an important factor may also consider salary an important factor. Nothing in the stimulus implies that these considerations are mutually exclusive.