Edith had a cold and spread her cold to her sister when her sister drank from the same glass edith had used that morning. this form of transmission is known as a. direct contact b. animals c. environment d. contaminated objects

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The correct answer is: D. contaminated objects

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The answer is (D.) Contaminated objects.

Because Edith had a cold, it contaminated the glass.

Contaminated objects definition:

Items that have viruses or diseases on them or in them.