Read the sentence given below to find out if it contains any error. The error, if any, will be in one part of the sentence. If the sentence is error free, select No error or option 5. Ignore error of punctuation if any.

Fish farming may have been devised as remedy(A)/ to reinvigorate dwindling fish stocks (B)/ but this human solution has spawned (C)/ another problem: lower genetic diversity. (D)/ No error (E)