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.