The answer is a, "Because they went to school."
This is because that statement does not give information on what happened due to them going to school. If you were to leave out "Because" surely it would stand alone as a sentence, given enough context.
Answer:
The story’s antagonist is the unnamed landlady who runs the Bed and Breakfast that Billy chooses to stay in. Although she appears to be sweet, friendly, and generous, the story’s plot twist reveals that she is a killer who does taxidermy on innocent young men.
Answer:
" Hypertext is simply a non-linear way of presenting information. ... This is accomplished by creating "links" between information. These links are provided so that readers may "jump" to further information about a specific topic being discussed (which may have more links, leading each reader off into a different direction). "
Explanation:
It helps you comprehend the text even better.
A. is the fragment. It has a gerund phrase but no actual verb that makes it a sentence. The other sentences do, however: was, is, and took.