The nurse is assessing a patient in the hospital who has received numerous antibiotics and notices that his tongue appears to be black and hairy. In response to his concern, what would the nurse say?
a. "We will need to get a biopsy and see what the cause is."
b. "This is an overgrowth of hair and will go away in a few days."
c. "This is a fungal infection caused by all the antibiotics you've received."
d. "This is probably caused by the same bacteria you had in your lungs."