An ideal monatomic gas is at `P_(0), V_(0)`. It is taken to final volume `2V_(0)` when pressure is `P_(0)//2` in a process which is straight line on `P -V` diagram. Then
A. The final temperature is equal to initial temperature
B. There is no change in internal energy
C. The work done by the gas is `+(P_(0)V_(0))/(4)`
D. The heat is absorbed in the process.