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What do mucus, saliva, and tears have in common?

A. They contain chemicals that attack pathogens

B they contain vaccines against pathogens

C. They are made of lymph

D. They contain only water

User Tauras
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2 Answers

1 vote

Answer:

D. They contain only water

Step-by-step explanation:

User Stiver
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2 votes

Answer:

D

Step-by-step explanation:

User Temica
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