Several cosmetics firms are committed to the active development, validation, and adoption of new product-safety tests that use cultures of human cells. They argue that the new tests serve to reduce the need for tests on live animals. The statements above most strongly support which one which one of the following conclusions? ['The pressure on cosmetics firms to cease conducting experiments that use live animals was initiated by groups of social activists.', 'Researchers in the cosmetics firms believe that fewer tests of products will be needed if cell cultures rather than live animals are used.', 'Consumers are no more likely to buy products whose safety was tested on cultures of human cells than they are to buy products whose safety was tested on animals.', 'Managers of the cosmetics firms believe that it is better for their firms not to perform tests on live animals if there is an acceptable alternative way of determining product safety.']