A student spends all of her income on pizza and books.When pizzas cost $3 each and books cost $10 each， she consumed 30 pizzas and 3 books per month.The price of pizzas fell to $2.90 each while the price of books rose to $11 each.The price chang

E.

A.made her worse off

B.left her exactly as well off； as before.

C.left her at least as well off； as before and possibly helped her.

D.had the same effect as a $3 increase in her income.

正确答案：left her at least as well off； as before and possibly helped her.