According to Godfrey if a child has a monthly allowance of $ 100 how much should he/she

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According to Godfrey, if a child has a monthly allowance of $ 100, how much should he/she spend on "impulse buys"?

A.$ 10

B.$ 30

C.$ 33.3

D.$ 50

热搜:a是b的充分条件,b是a的必要条件吗