Question #N997

The first sentence of this passage introduces the main topic, which is the dangers of driving while drowsy. The second sentence provides a specific example of the dangers of driving while drowsy, which is the driver’s inability to stay awake. The final sentence states that drowsy driving can be dangerous, but the passage doesn’t provide any specific details about the dangers. What is the main idea of this passage?

Which choice best describes the function of the underlined sentence in the text as a whole?
A. It establishes that a character is experiencing an internal conflict.
B. It introduces a problem that is examined in the text.
C. It makes a claim that is challenged in the text.
D. It presents a hypothesis that is evaluated in the text.