Final answer:
D) The line is metaphorical, and he wants Brutus to remain honest. Cassius' line is a metaphorical expression of his belief that their failures are due to personal flaws and not destiny. Brutus is urged to address these flaws in order to achieve success.
Step-by-step explanation:
Cassius' famous line, 'The fault, dear Brutus, is not in our stars,' is from Shakespeare's play Julius Caesar. The line is metaphorical and Cassius is expressing his belief that their failures and shortcomings are not due to fate or destiny, but rather their own personal flaws. Cassius wants Brutus to address and overcome these flaws in order to achieve success in their plans to overthrow Caesar.