Bio question. Click please.?

"Scientists use the rate of mutations in DNA, which occur at regular rates, to predict when two organisms branched off from a common ancestor. Most scientist agree that the great apes - chimpanzees, gorillas, and orangutans - share a common ancestor with humans, but there is a fierce disagreement as to when the branching off occurred. Some scientists believe that the split was simultaneous, while others believe that the 1st to branch away were the orangutans, then gorillas, then chimps, and finally humans In this branching debate, which is more plausible according to your findings? "