请选择CBA*P,y5n8H-E;{'R-k.i'u4F,s.n)w:p1D ___________ your father _________ the trees now?,O9t5@7o-S6v;V
A. Is; watering,O9t5@7o-S6v;V
B. Does; water,O9t5@7o-S6v;V
C. is; water,O9t5@7o-S6v;V