I would say the 1st one is the only one correct. The 2nd one should be who, the 3rd one should more and likely be whom, and the last one should probably be who. I don't know if I'm 100% though. I hope I helped.
What is the story ? There is no indication
it is more important to think because that is what causes your actions.
C. Human in vanity can cause a lot of problems. Apex
