请选择CBA,M1Z,^*^'U6z9L)N2t3A:i*x6H;g*N/g The hippos have big_______.'};M)U-B-F2R-F1Y/[.u
A. months'};M)U-B-F2R-F1Y/[.u
B. month'};M)U-B-F2R-F1Y/[.u
C. mouths'};M)U-B-F2R-F1Y/[.u