【单选题】The price of cereal rises. As a result, people have cereal for breakfast on fewer days and eat eggs instead. This behavior is an example of (谷物价格上涨。因此,人们在较少的日子里吃早餐,吃蛋。这个行为就是一个例子——中文由在线翻译而来,仅供参考.下同.)
A.
a decrease in the quantity demanded of cereal because of the substitution effect.由于替代效应,谷物需求量下降。
B.
an increase in the quantity demanded of eggs because of the income effect.由于收入影响,鸡蛋需求量的增加。
C.
a decrease in the quantity supplied of cereal because of the substitution effect.由于替代效应,谷物供应量减少。
D.
an increase in the quantity supplied of eggs because of the income effect.由于收入影响,鸡蛋供应量增加。