I would say that there is no other living thing on earth that can react to medical testing like animals can, for example, testing it on plants wouldn't do us any good. but if you tested it on animals and it changed their hair purple or something then you gained new information that with out testing would have been unknown.
if you have options then I can help more, since it says "would most weaken"
Answer:
a. Is the source credible? Is this source self-published (like a blog or Q/A forum), is there no author listed, does this organization publishing look like a credible source?
b. How old is this source? When was this source published. Does the topic of your paper require current source, or will older publications still be relevant?
d. Is the writing propaganda, opinion or fact? After reading the source, does the source appear to try and persuade you to one way or another, or does the source appear to state facts. When stating facts, does the source cite ITS sources properly?
Explanation:
brainly.com/question/12396961
Hope this helps.
Answer:
The occasion and audience
Explanation:
