请选择CBA*E3P-a-h6{9v(U8I-{ Peter is __________ English boy, he studies in __________ primary school.:k3s*C2D6m7T+}-k3c7Y
A. a; a:k3s*C2D6m7T+}-k3c7Y
B. an; an:k3s*C2D6m7T+}-k3c7Y
C. an; a:k3s*C2D6m7T+}-k3c7Y