Question

consider this claim: animals should be used for research because animal research saves human lives. which is the strongest evidence to support the claim? animals are used in research related to genetics, diagnosis, and development of new medicines and other products. bacterial infections were once a major cause of death, but animal experiments led to the development of penicillin, which radically changed our ability to treat these infections and prevent death. animal rights groups that are supported by millions of americans have stated that animal lives are no less valuable and meaningful than human lives.

Explanation:

• The first option only states that animals are used in research related to certain areas but doesn't directly show how it saves human lives.
• The second option gives a specific example (penicillin development through animal experiments) that shows how animal research has saved human lives (by treating bacterial infections which were a major cause of death).
• The third option is about animal rights groups' view on animal lives being as valuable as human lives, which is against the claim that animals should be used for research to save human lives.

Answer:

Bacterial infections were once a major cause of death, but animal experiments led to the development of penicillin, which radically changed our ability to treat these infections and prevent death.