Rowan Was Relaxing and Not Really Paying Attention to Anything

Multiple Choice

Rowan was relaxing and not really paying attention to anything when his roommate came home.The roommate has asked for help working through some difficulties with a computer program.What will happen to Rowan's brain waves as he helps his roommate

A)  They will decrease in both frequency and amplitude. 
B)  They will increase in frequency and decrease in amplitude. 
C)  They will increase in both frequency and amplitude. 
D)  They will decrease in frequency and increase in amplitude.