For Normal Goods Like Cola and Pizza,what Happens Due to the Substitution

Multiple Choice

For normal goods like cola and pizza,what happens due to the substitution effect when the price of pizza falls

A) There is a shift to a lower indifference curve, so the consumer buys more cola.
B) There is a shift to a higher indifference curve, so the consumer buys more cola.
C) There is movement along the indifference curve, so the consumer buys more cola.
D) There is movement along the indifference curve, so the consumer buys less cola.