请选择DCBA1^+U2Z:A9k)?/P)\.n/g Five and seven ________ twelve.8P6N6j){6S2g-c+N
A. be8P6N6j){6S2g-c+N
B. are8P6N6j){6S2g-c+N
C. is8P6N6j){6S2g-c+N
D. am8P6N6j){6S2g-c+N