The performance of a reciprocating compressor is expressed by

• A. \(\frac{{isothermal~work}}{{indicated~work}}\)
• B. \(\frac{{adiabatic~work}}{{indicated~work}}\)
• C. \(\frac{{isothermal~work}}{{adiabatic~work}}\)
• D. \(\frac{{adiabatic~work}}{{frictionless~work}}\)