What swap space size is recommended for the smooth performance of the system?

You upgraded the RAM of your system from 1 GB to 2 GB. The applications running on the system perform memory-intensive operations. What swap space size is recommended for the smooth performance of the system?

A.
2 * the size of physical memory

B.
1.5 * the size of physical memory

C.
0.75 * the size of physical memory

D.
equal to the size of physical memory