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What causes colds?
A. Not dressing warmly when it's chilly.
B. Microscopic virus in the air or on the things you touch.
C. sitting or sleeping on a draft.
D. going outside with wet air.

Respuesta :

Answer:

About 10% to 15% of adult colds are caused by viruses also responsible for other, more severe respiratory illnesses.

B

Explanation:
Answer is B. Microscopic virus in the air or on the things you touch.

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