Answer: B
Explanation:
Sentence B is the least awkward out of the 3 options
I am willing to help you out however the question is incomplete
Sentence A has a disagreement between "were" (plural) and "no one" (singular).
Sentence B has a disagreement between "was" (singular) and "problems" (plural).
Sentence C, however, has complete agreement between the subject and verb. Therefore, the answer is C.