Which One of the Following Statements Best Describes Wait Time

Which one of the following statements best describes wait time and its effects?

A) When teachers give students about five minutes of "thinking time" at the beginning of class, students are more likely to learn class information meaningfully.
B) When teachers allow students more time to learn something, students are more likely to learn effectively.
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.