The 3rd one
but he should also jot down a list of questions he intends to ask during each call and should be writing down the responses he receives as well as any follow up numbers etc that he needs to call <span />
Suicide would be your answer.
Answer:
The scientist was Ivan Pavlov
Explanation:
He was a Russian scientist, who performed multiple research on dogs. He is best know for his experiments in classical conditioning.
B. is your best answer
have an amazing day! XD