[单选题]
Water flows through a pipe. The diameter of the7 +ltt4:h fq:nnda/ wx pipiwvxl*dh .bn vb;v9 /)e at point B is larger than at point A. Where b9;vldh w*v.x/i)b nvis the speed of the water greater?
A. point A
B. point B
C. same at both A and B
D. cannot be determined from the information given
