The best answer for this question would be:
C. were helping
The answer is C, because the one noun is a singular while the other one is paired with a plural, so the verb should be in plural form as much as possible.
Answer:
A. Marcus threw the ball to his teammate.
Explanation:
threw the ball is an active verb the rest of the sentences are incorrect because they're in the past tense
A.
the description of human struggles in the form of Iven Llyich's suffering
B. A puzzled tone
B
but where is it i mean the plays ?