Which Pair of Phrases Makes the Following Sentence True When

Which pair of phrases makes the following sentence true when inserted in the blanks? Intoxication is caused by __________, and infection is caused by __________.

A) poisons produced by bacteria, bacteria that attack the body
B) bacteria that attack the body, poisons produced by bacteria
C) physical contamination, metals (e.g., lead, copper, and zinc)
D) metals (e.g., lead, copper, and zinc) , physical contamination

Correct Answer:

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