A patient with a fungal infection asks the nurse why she cannot take antibiotics. The nurse explains that the reason for this is that a fungus is resistant to antibiotics because 

a. A fungal cell wall has fewer but more selective protective layers. 

b. The composition of the fungal cell wall is highly rigid and protective. 

c. A fungus does not reproduce by the usual methods of cell division. 

d. Antibiotics are developed to affect only bacterial cell walls.