The correct answer is Carol has a cottage near the shore.
This supporting detail has nothing to do with her study of marine life. She could have this cottage because she inherited it, or she just likes the place - it doesn't really contribute to her love or study of marine life. The other options clearly support why she is studying marine life, whereas the one with the cottage does not.
The original one came out in 1971, so if that's the one you're talking about it was, Peter Ostrum. Hope this helps! :) :D (ps. let me know if this is not the version you were talking about.)
Answer:
9/11 showed that america will retaliate against threats to their country. meaning from then on America has been in many other wars against terrorism. Like when america helped fight ISIS.