How long ago did the hominin evolutionary line diverge from that leading to the great apes?

How long ago did the hominin evolutionary
  line diverge from that leading to the great
  apes?
  a. about 3 million years ago
  b. between 10 million and 5 million years ago
  c. during the Eocene epoch
  d. less than 2 million years ago
  e. about 1.5 million years ago

Question 2

Bipedal behavior and a skeleton adapted for
  bipedalism were not weeded out by natural
  selection because they
  a. improved stability during locomotion.
  b. enabled the forelimbs to efficiently
  manipulate the environment.
  c. accelerated the development of binocular
  vision.
  d. improved stability during locomotion and
  enabled the forelimbs to efficiently
  manipulate the environment.
  e. improved stability during locomotion,
  enabled the forelimbs to efficiently
  manipulate the environment, and
  accelerated the development of binocular
  vision.