Should researchers be allowed to use animals in testing the safety of drugs, vaccines, medical devices, and cosmetics?

Definitely not for cosmetics, and not for situations where the substance places humans at little risk. All other options should be considered before animal testing, it should be an essential need for examining the action of the product or process.

Yes, but only for things that are necessary to our lives, like vaccines, but not anything connected to cosmetics.

Use proven criminals, convicted of violent crimes, who are in prison for 10+ years (or a life sentence)

testing on animals should be avoided and only to be done in very restricted circumstances such as in medical safety only and restricted to only certain animals like mice and rats.

it depends on if the drug makes the animal unsafe for human consumption, if it does then no, if it doesn't then its fine because the animal wasn't used just for testing

I agree there should be a boundary here of some sort cause of the organs. yet again the animal cruelty so depends I guess

Yes, but not for cosmetics and only if it's a necessity to ensure the medical safety of those whom may be affected by the product.