Question

Which of the following is a sentence fragment?

A) knowing he would be late, she took a nap.
B) hiding in the tree fort he built as a kid.
C) checking his mail each day was always fun.
D) realizing you are getting older is sobering.

Answer 1

A I guess so that should be the correct one

Answer 2

Option B) hiding in the tree fort he built as a kid is a fragment. That is a dependent clause that makes no sense by itself.