Task: Question Answering
Input (English): If \(p\) is a multiple of 3 and \(q\) is a multiple of 5, which of the following must be true? I. p+q is even. II. pq is odd. III. 5p + 3q is a multiple of 15.
(A)I only (B)II only (C)III only (D)I and II only (E)II and III only
Output (English): C