[单选题]
Water flows through a pipe. The diameter of the piaej .w )23fiy6kwzwa 5pe at point B is larn6-w vis*+- cbpvc7spger than at pvs+-p*-s 6cpc7i b nvwoint A. Where is 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
