Answer:
D.
Step-by-step explanation:
D is the best answer because we are focusing on the hook of this statement. Obama is a well known person and can attract views or attention to some people. With this being said, him being mentioned can create a good hook.
Reasons why the other answered aren't correct:
A.- a simple but dramatic statement like "Yes, we can" is not a large hook.
B.- the statement mentioned is only talking about a small quote in one's life, not a story or description.
C.- the statement mentioned is not startling or little-known of.
E.- the statement mentioned has nothing to do with explaining a definition.
Hoped this helped! :)