C. Combine it with a sentence fragment
Cassius wants brutus (Caesar's nephew) to kill Caesar in the senate house with a whole bunch of other senators...
I would say C. at ten o'clock; modifies came. Adverb phrase always involves when, where, or how. In this sentence, you could ask when did the truck came? Then you adverb phrase would it came at ten o'clock.
I hope this helps!<span />
