hope wrote:Why can't A be just as true? F I J I J. Here, F works only one day a week
Why can't B be just as true? F I F I J. Here, F works two days a week
Why can't D be just as true? F I F I J Here, J works only one day a week.
I guess I don't get it. Does it have something to do with the "must be true" requirement? Thanks.
It does indeed have to do with the Must Be True requirement! What you are doing above is showing a single example and saying that shows the answer could be true. Yes, it does, but the standard here is Must, not Could. And so if I can find an exception to the answer—and we did that on the prior page—then the answer is wrong.
One tip here: note that all your examples keep showing I working twice a week, which turns out to be the correct answer.
Does that help?