left-handed people demonstrated greater brain activity than right-handed people when under the influence of drugs. This statement should be classified as

1 the problem =the main issue or subject being investigated in the study
2 a method = a procedure, process, or approach used to investigate the problem
3 a finding = a proven result obtained as a part of the investigation
4 an assumption = a supporting idea, belief, or theory for which no proof is provided In the study
5 irrelevant information = material that does not directly help to provide an understanding of the problem

I believe the answer is 3 a finding ?!

Yes, 3.

thank you Ms. Sue, and I believe on my other question I got wrong, its 2 a method:/

You are correct! The statement that left-handed people demonstrated greater brain activity than right-handed people when under the influence of drugs is indeed classified as a finding. A finding is a proven result obtained as a part of an investigation or study. In this case, the finding suggests that there is a difference in brain activity between left-handed and right-handed individuals when under the influence of drugs.