(65) -------- common symptoms of jet lag are fatigue and irritability

Câu hỏi :

Part VI: Reading Comprehension
Directions: Read the texts that follow. A word or pharse is missing in some of the sentences. Four answer choices are given below each of the sentences. Select the best answer to complete the text. Then mark the letter (A), (B), (C) or (D) on your answer sheet.
Question 65 - 67 refer to following paragraph:

Is there a way to prevent jet lag?
Jet lag is a sleep disturbance. (65) -------- common symptoms of jet lag are fatigue and irritability. One of the most recommended ways of reducing its effects is to adjust to the new time zone of your destination.
Research into the effects of natural light on the body (66) -------- that light may help you become used to the area you visit.
So, if you fly east to west, stay outside for several hours in the afternoon on the day you arrive to (67) -------- yourself to the sun and get out early the next morning.

65. (65) -------- common symptoms of jet lag are fatigue and irritability.