Monkeys in the New World (The Americas) Have Prehensile Tails

Monkeys in the New World (the Americas) have prehensile tails, strong flexible tails that grip branches and operate much like another hand. Old World (Africa and Asia) monkeys do not have such a tail. The explanation for this is

A) monkeys in the Old World did not need a prehensile tail and therefore did not evolve one.
B) monkeys in the New World needed a prehensile tail and therefore evolved one.
C) the prehensile tail evolved in New World monkeys after the Americas separated from Africa and Asia.
D) the Americas are much older than Africa and Asia. There has not been enough time to evolve a prehensile tail in Africa and Asia.
E) a catastrophe occurred in the Old World that killed all prehensile tail monkeys leaving only non-prehensile tailed monkeys to survive.