AFCAT II 26 AUG 2022 Shift 1 Paper

In the following question, the given sentence has four parts marked as A, B, C, and D. Choose the part of the sentence with an error and mark it as your answer. If there is no error, mark D as your answer.
If I am the principal (A) / of the school (B) / I would make co-curricular activities compulsory for each student (C) / No Error (D)