Which is a sentence fragment?
a) a crowd was drawn by a skateboarder doing flip tricks.
b) doing flip tricks, a skateboarder drew a crowd.
c) a crowd drawn by a skateboarder doing flip tricks.
d) a skateboarder doing flip tricks drew a crowd.

The answer is C

Explanation:

What is missing is a helping verb like "was" before the word drawn to make the sentence complete

cassius, casca, and their allies plant false documents to manipulate brutus to join their cause to remove caesar. after doing so, they visit brutus at night in his home to persuade him of their views. there they plan caesar's death. brutus is troubled but refuses to confide in his devoted wife, portia. on 15 march, caesar's wife, calpurnia, urges him not to go to the senate. she has had visionary dreams and fears the portents of the overnight storms.

im not to sure