With modern technology, scientists can make advances without involving the one hundred million animals now used each year for animal testing.
This option is the best rebuttal because it leaves out subjective reasoning. It also uses numbers to help give the statement more power. Option B is not a good choice because it doesn't actually go against the counterclaim; instead, it supports it. Option C is also not a good choice because it validates the counterclaim and only gives a weak statement of opinion. Option D is also not a good choice because it also only states an opinion rather than any facts.
