Question

A farmer is trying to determine why some weeds sprayed with weed killer do not die.

Answer 1

Answer:

Research what others have already found.

Explanation:

If people have already figured out the problem and solution then he won't need too. Hope This Helps:)

Answer 2

Yes, you're correct, it's the first one. He should do research before he does an experiment, because someone else may already know.