Answer: "Casca joins the conspiracy because Cassius uses various means to manipulate his emotions."
The answer is a bit of all of them but mostly b
Answer:

Explanation:
Whenever we are trying to incorporate a coordinating conjunction to combine two sentences, it is not necessary to use commas.
=> The conjunction itself is used to combine both the sentences so, using a commas is an unnecessary thing!
![\rule[225]{225}{2}](https://tex.z-dn.net/?f=%5Crule%5B225%5D%7B225%7D%7B2%7D)