Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct answer to each of the questions from 36 to 40.
What is the main idea of the passage?
A. Human ancestors became predominantly right-handed when they began to use tools.
B. It is difficult to interpret the significance of anthropological evidence concerning tool use.
C. Humans and their ancestors have been predominantly right-handed for over a million years.
D. Human ancestors were more skilled at using both hands than modern humans.
Đáp án: C