In a Research Study,participants Were Shown Images with Houses Superimposed

In a research study,participants were shown images with houses superimposed on faces and asked whether they saw a house or a face.When researchers looked at the participants' brain responses during this task,they found that

A) brain activity changed depending on whether participants said they saw a house or a face.
B) brain activity was the same,regardless of whether participants said they saw a house or a face.
C) participants' brains emitted large,slow-wave activity equally for both images.
D) participants' brains had activity in two regions,indicating that they saw both the house and the face.