Which of the following occurs during sleep? a. The brain “plays back” certain experiences of the day but more slowly. b. Certain synapses become weakened, enabling others to stand out by contrast. c....

Which of the following occurs during sleep? a. The brain “plays back” certain experiences of the day but more slowly. b. Certain synapses become weakened, enabling others to stand out by contrast.

c. Synapses corresponding to the experiences of the day become strengthened. d. Overall brain activity increases.