adults spend about ______% of their sleep in stage 2. select one: a. 20 b. 50 c. 30 d. 40

adults spend about ______% of their sleep in stage 2. select one: a. 20 b. 50 c. 30 d. 40
Answer
Brief Explanations:
Based on sleep - research knowledge, adults typically spend about 50% of their sleep in Stage 2.
Answer:
b. 50