During viral infection, attachment is usually specific to aparticular cell type because
a. The virus is attracted to the appropriate host cells by proteinssecreted into the extracellular fluid
b. The virus recognizes and binds to specific molecules in thecytoplasm of the host cell
c. The virus recognizes and binds to specific molecules on thesurface of the host cell
d. The host cell produces channel proteins that provide passagewaysfor viruses to enter the cytoplasm
e. The virus releases specific proteins that make holes in themembrane large enough for the virus to enter.