F: We ought not to test the safety of new drugs on
sentient animals, such as dogs and rabbits. Our
benefit means their pain, and they are equal to
us in the capacity to feel pain.

G: We must carry out such tests; otherwise, we
would irresponsibly sacrifice the human lives
that could have been saved by the drugs.

Which of the following, if true, is the best objection
that could be made from F's point of view to coun-
ter G's point?
(A) Even though it is not necessary for people to
use cosmetics, cosmetics are also being tested
on sentient animals.
(B) Medical science already has at its disposal a
great number of drugs and other treatments
for serious illnesses.
(C) It is not possible to obtain scientifically ade-
quate results by testing drugs in the test tube,
without making tests on living tissue.
(D) Some of the drugs to be tested would save
human beings from great pain.
(E) Many tests now performed on sentient animals
can be performed equally well on fertilized
chicken eggs that are at a very early stage of
development.