An excited or emotional state is a stirred up condition of the whole organism and not of one part of it alone. Psychology describes such a state as having two sides that always appear together.

On the outer side the changes can be seen and heard by anyone present: the face reddens, the voice rises, gestures become sharp, posture stiffens and movement grows restless. On the inner side the changes are felt by the person but remain hidden from others: the heart beats faster, breathing deepens, the mouth dries, digestion slows and the ductless structures pour secretions into the blood that prepare the body for sudden effort.

Since the visible and the hidden changes occur in the same moment and are two expressions of a single aroused condition, neither of them can be chosen while the other is left out. Ordinary unexcited conduct is precisely what is replaced during such a state, so it cannot itself be the thing that alters.

Both (A) and (B) option is correct.