In this question, if you were to diagram out the answer choices, you could diagram (A) and (E) like I did below. However, I would consider whether diagramming these answer choices is truly efficient or even necessary.
The stimulus is focused on two scenarios: 1) all parties are blamed equally; and, (2) only one party is blamed. Nothing in the stimulus focuses on what occurs when an incumbent candidate, rather than the party, is responsible for a scandal. So answer choice (A), which presents the responsibility of individual incumbent candidates, rather than parties, as the compound sufficient condition, is totally unconnected to the stimulus. Be cautious about diagramming each answer choice without narrowing down the possibilities first. If you have any thought of completing the section within the allotted, diagramming answer choices should be the exception, rather than the rule.
That being said, the diagrams you requested are:
responsible for MPS1
consequences same for both Incumbents(a&b)
responsible for MPS2
MPS resp of party more than individual
party penalized when possible