What is the subject of the following sentence? as she slalomed lightning-fast around the moguls, jessica knew she would win the race.

The subject of the sentence is Jessica. She is the one acting on the verb and what the word "she" is referring to.

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.

i don't see any right answer. i don't know english and only math