For optimal sleep, the text recommends exposure to natural ...

[tatyanajohnson]

For optimal sleep, the text recommends exposure to natural sunlight for ________ hours per day.
 
  A) two
  B) four
  C) six
  D) There is no limit; the more exposure to natural light during the day, the better one should sleep.

Question 2

For optimum sleep, if you cannot cut out caffeine completely, the text suggests drinking coffee or tea no later than
 
  A) breakfast.
  B) lunchtime.
  C) dinnertime, or approximately six p.m.
  D) nine p.m.

[abctaiwan]

Answer to Question 1

Answer: D

Answer to Question 2

Answer: B