Question

which of the following topics is limited enough for a single paragraph? A. problems that my family has had lately B. different types of used in the world C. what went wrong on my family's last boat trip

Answer 1

The answer is C.
The other ones are to diverse to capture in a single paragraph.

Answer 2

I'm saying C, because A says *problems* plural, as in more than one. B isn't too clear to me. different types of what used? But, it says "different types," as in more than one. Where C reads as if it was one thing that went wrong, therefore there would be less to list, and make it suitable for just one paragraph.