Which of the following can improve the hard drive performance?

When a Linux laptop runs on battery, the hard drive performance significantly decreases. Which of the following can improve the hard drive performance?

A.
Increase the amount of swap space on the disk.

B.
Decrease the amount of swap space on the disk.

C.
Decrease the APM (Advanced Power Management) value for the hard drive.

D.
Increase the APM (Advanced Power Management) value for the hard drive.