394 In which of the following descriptions would centrifugal pump impeller cavitation most likely occur if the impeller diameters, rotating speed, and liquid temperature are the same?

A. In the second stage of a two-stage pump.
B. A single-stage impeller with straight vanes.
C. A single-stage impeller with curved vanes.
D. A two-stage pump with an operating speed 100 RPM less than specified.