When an event occurs that changes the demand for coffee makers coffeemakers, _______ if demand increases and______ if demand decreases.

A.

the demand curve shiftsleftward; the demand curve shifts rightward

B.

a movement up along the demand curveoccurs; a movement down along the demand curve occurs

C.

the demand curve shiftsrightward; the demand curve shifts leftward

D.

a movement down along the demand curveoccurs; a movement up along the demand curve occurs