If food is measured on the horizontal axis of a budget line diagram, and clothing is measured on the vertical axis, an increase in

a. the price of food will decrease the slope (e.g., -9 instead of -6) of the budget line
b. the price of food will increase the slope of the budget line
c. income will decrease the slope of the budget line
d. income will increase the slope of the budget line
e. the price of clothing will decrease the slope of the budget line

A