Ok, I said c) for #1 b/c this is one of those exceptions that Kurtz went over in class: the "dying without issue" exception. I at first wanted to say d), but there is no right of re-entry specified in the instrument. Anyway, since this is before 1500, under the indefinite failure of construction p.56 in the green book, I think the answer to #1 is c).
Anyone else with questions? I'm more than happy to share what I think the answers are.