When Chiu and Yantis (2009)directed Viewers' Attention to Either the Left

When Chiu and Yantis (2009) directed viewers' attention to either the left or right side of a display and then measured brain activity with fMRI,they found that

A) brain activity changed but only when the eyes actually moved.
B) brain activity was not related to attention.
C) actual eye movements were not needed to cause changes in brain activity.