Answer:
D. She encourages us to read and write well, too
Step-by-step explanation:
The topic sentence is about your teacher rewarding you.
The question is about which of the 4 sentences would NOT support the main idea of reward.
Options A, B and C are some forms of reward (movie coupons, longer recess and playing CDs). So, each of those sentences do support the main idea of reward.
Option D is about encouragement to do something right, not a reward for doing it. If she would congratulate you for doing it, that could be seen as a reward... but the sentence only talks about encouragement.