Can we please have Kevin's explanations updated for especially the RCs? No offense but MANY explanation videos from JY don't help me at all.

Can someone help me with AC C?

I get how all the other answers work, but I don't get how the case in AC C cannot be denied.

The stimulus says that one can receive credit only if a missed copy is reported within 24hrs and a replacement is unavailable. But in AC C, Ms. Herrera doesn't have a missed copy. She rather has received the copy for which she requested a temporary nondelivery. How come can she still receive credit for this? #help

#help The stimulus states that many important types of medicine HAVE BEEN developed. If they have already been developed, why would it mean that if the tropical rain forests aren't preserved, important types of medicine will never be developed?

I didn't assume the plants not yet studied had to differ from the ones already discovered in order to say that medicine will be developed, which was why I got rid of A in the first place. Does it necessarily have to be new plants to be able to claim that medicine has developed?