Answered

Which group is a complete sentence?

AStarted his homework late Sunday night.
BThe exciting end of he baseball game.
CShe did not understand what happened.
DTwo energetic women walking in the park.

Verified Answer :

Abbygal

C.

The others are not complete thoughts, they are dependent clauses.
The exciting end of a baseball game (what about it?)
Two energetic women walking in the park... came across a pond. (That's better)
Started his homework late Sunday night.. and as a consequence he was late to school on Monday. Now it sounds more complete