Which of the following most accurately explains why the quantity of word processing software exchanged increases from one year to the next? a decreasing number of people use word processing software on their various devices, which causes a leftward shift of the supply curve. an increasing number of people use word processing software on their various devices, which causes a rightward shift of the demand curve. an increasing number of people use word processing software on their various devices, which causes a rightward shift of the supply curve. a decreasing number of people use word processing software on their various devices, which causes a leftward shift of the demand curve.