Starting with the same initial conditions,an ideal gas expands from volume $V_{i}$ to $V_{f}$ in three different ways. The work done by the gas is $W_{1}$ if the process is purely isothermal,$W_{2}$ if the process is purely adiabatic,and $W_{3}$ if the process is purely isobaric. Then,choose the correct option.

• A
  $W_{1} < W_{2} < W_{3}$
• B
  $W_{2} < W_{3} < W_{1}$
• C
  $W_{3} < W_{1} < W_{2}$
• D
  $W_{2} < W_{1} < W_{3}$