Tryon Edwards, an American theologian, once said, "If you would thoroughly know anything, teach it to others." What Edwards meant was that teaching is itself an effective way to learn something. This may sound backwards because we assume that teachers are already experts in their chosen field. However, learning is an ongoing process.
And as Edwards suggests, learning is very much enhanced by two actions: communication and repetition. Communication is perhaps the most obvious way in which teachers learn. Because no two students think exactly alike, a teacher must be able to communicate the same idea in myriad ways. This can be incredibly challenging. It requires the teacher to use different words and concepts to explain the same idea. Doing so enhances the teacher's knowledge of the given subject matter.
Another way in which teachers learn is through repetition. Repetition allows teachers to re-learn or memorize something they might otherwise have forgotten. For example, while students are expected to remember all of the U.S. capitals only for a short time period, teachers are expected to remember the capitals indefinitely. Because teachers are engaged in teaching the same material each year, they are repeating their knowledge—committing it to memory.

Which of the following would make the best thesis for the passage?
A.
Students learn better from teachers who know how to repeat information well.
B.
Committing information to memory takes years of repetition and communication to achieve.
C.
By communicating and repeating what they learn, teachers can continue to learn.
D.
Teachers are expected to remember the U.S capitals and teach their students.