Which Statement Regarding Polio Vaccines Is False

Which statement regarding polio vaccines is False?

A) OPV is an oral, attenuated vaccine. It provides better mucosal immunity than IPV and it can transmit immunity from person to person.
B) OPV does not require an injection and is cheaper, but it requires refrigeration and may occasionally cause the disease.
C) The rare cases of polio that still occurred in the U.S. after poliovirus was eliminated were caused by vaccine-derived poliovirus (VDPV) .
D) IPV is unreliable at eliciting production of mucosal antibodies as demonstrated when polio occurred in a country that previously relied only on IPV vaccination.
E) The small risk of developing poliomyelitis due to vaccine-derived poliovirus led the United States to change to the routine use of OPV only.