A multistage centrifugal pump can be BEST described as having （）.<br>A:two or more impellers housed together in one casing and mounted on a single shaft<br>B:a single stepped impeller mounted in a progressively staged casing<br>C:a large radial clearance between the impeller and casing to prevent overheating due to<br>D:an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages

A multistage centrifugal pump can be BEST described as having （）.
A:two or more impellers housed together in one casing and mounted on a single shaft
B:a single stepped impeller mounted in a progressively staged casing
C:a large radial clearance between the impeller and casing to prevent overheating due to
D:an increase in the discharge velocity of the liquid with a corresponding decrease in pressure through the stages

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