The Parent of a Child Receiving the Polio Vaccine Wants

The parent of a child receiving the polio vaccine wants to know why the oral polio vaccine (OPV) is not given. The nurse will explain to this parent that the oral preparation:

A) can cause paralytic poliomyelitis.
B) contains antigens that increase allergic reactions.
C) is less effective than the IPV.
D) is more expensive to administer.