In which of the following do the mucous membranes serve as a portal of entry for disease?
A. a pathogen crosses from the mother to the fetus by way of the placenta.
B. A person rubs the eye with contaminated fingers and the pathogen is washed into the nasal cavity by way of tears.
C. A person is bitten by a mosquito that carries the malaria parasite.
D. Fungi digest the outer layer of the skin.
E. A person receives an injection with a contaminated needle.
Answer: B
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