25.Olivia: What’s the biggest source of pollution? The answer might surprise you.
Fenny: Plastic bags?
Olivia: No, throwaway diapers.
Fenny: But how come they became a source of pollution?
Olivia: _______________
(A) About fifty years ago.
(B) They don’t break down easily.
(C) Cotton diapers are good for the environment.
(D) People are using fewer throwaway diapers.
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