For any given volume of compressed air produced by a multistage air compressor, interstage cooling will __________.

Correct Answer: Option B — decrease the power required for compression

Interstage cooling reduces the temperature of the air before it enters the next compression stage. According to the ideal gas law, cooling the air reduces its specific volume, which lowers the work required for compression. This process moves the compression cycle closer to isothermal, significantly improving overall compressor efficiency.