The passage is mainly concerned with _______.

A．Only some animals should be used for research.
B．Scientists and doctors should respect the views of the public.
C．The benefits of animal tests should be made widely known.
D．The debate on animal tests be put to s serious public poll.

A．the idea that other methods can be substituted for animal research
B．the claim that animal experiment is intentionally cruel
C．the belief that all drugs developed with animal tests are dangerous
D．the fact that scientists and medical organizations support animal experimentation