Gertrude has a $15 budget to spend on soda and crackers. Soda costs $1 per bottle and crackers cost 50¢ each. If the price of soda increases to $2 per bottle, the ________ rotates inward and there is a movement along the ________.
A.
budget line; demand curve for crackers
B.
demand curve; indifference curve for crackers
C.
budget line; demand curve for soda
D.
demand curve; indifference curve for soda
E.
indifference curves; demand curve for soda