Considering the Research Findings Described in the Textbook, Only One

Considering the research findings described in the textbook, only one of the following is a true statement.Which one is true?

A) Repeating something over and over is usually the most effective way to learn it.
B) Girls have a noticeable advantage over boys on verbal tasks.
C) For optimal performance, students should never feel the least bit anxious in the classroom.
D) Students often study differently for different kinds of classroom assessments.