I see that (D) could be true. Is (B) wrong since it must be true--and question was only asking what could be?
If so, the question is similar to 18, which included a couple "could be true" answers in addition to the one "must be true" correct answer.
Is this a recent change in the LSAT? It seems that few if any LG questions from earlier tests included a mixture of must and could be true answers to see if we would pick one of ones not asked for--unless I'm just not recalling these from earlier tests. Something else to have to check for before pulling the trigger...