M University student Xiao Duan suddenly became seriously ill, and a classmate secretly donated money to help  After Xiao Duan turned from crisis to safety, he wanted to know who made the donation  He asked five students and got the following answers: (1) Either A donated or B donated; (2) If A donated, then C also donated; (3) If B did not donate, then D donated; (4) Neither A nor B donated
In fact, only one sentence of the five students'answers was yes fake
C donated