Which One of the Following Statements Describes Wait Time and Its

Which one of the following statements describes wait time and its effect on learning?

A) When teachers give students about five minutes of "thinking time" at the beginning of class, students are more likely to learn class material meaningfully.
B) When teachers allow students more time to learn something, students learn it more thoroughly.
C) When teachers wait until students are ready to pay attention, students are more likely to learn effectively.
D) When teachers allow students more time to respond to a question, students are more likely to answer the question, and often with a more complex response.