| Regarding the high-pressure pump of a reverse-osmosis freshwater generator, what statement is true? |
| A) The high-pressure pump is typically a multiple-cylinder reciprocating pump, but may be a multi-stage centrifugal pump. |
| B) The high-pressure pump is typically a two-stage rotary pump, but may be a two-stage centrifugal pump. |
| C) The high-pressure pump is typically a two-stage centrifugal pump, but may be a two- stage rotary pump. |
| D) The high-pressure pump is typically a single-cylinder reciprocating pump, but may be a single- stage centrifugal pump. |
