Total number of students in class = 40
A): Candidate A received 11 of the votes Since, A received less than half the number of votes, then A did not receive the maximum number of votes. Thus, statement A alone is sufficient.
B): Candidate C received 14 of the votes
Now, A could have received more than 20 votes or even less than 14, since it cannot be determined, hence this statement alone is not sufficient.
The correct option is (A): If the question can be answered by one of the statements alone and not by the other