请选择ABC2T0d(A(R*p3L-L)U'S/f)~/uWe can see _________ birds in the tree.;l6k6N5^*K)Q7k5~
A. a;l6k6N5^*K)Q7k5~
B. lot of;l6k6N5^*K)Q7k5~
C. lots of;l6k6N5^*K)Q7k5~