Read the following passage and choose the best option A, B, C, or D to indicate the correct word(s) for each of the numbered blanks.    

  The expression on your face can actually dramatically alter your feelings and perceptions, and it has been proved that (1) ____ smiling or frowning can create corresponding emotional responses. The idea was first (2) _______ by a French physiologist, Israel Waynbaum, in 1906. He believed that different facial (3) _______ affected the flow of blood to the brain, and that this could create positive or negative feelings. A happy smile or irrepressible laughter increased the blood flow and contributed to joyful feelings. But sad, angry expressions decreased the flow of oxygen- carrying blood, and created a vicious (4) _______ of gloom and depression by effectively (5) _______ the brain of essential fuel. Psychologist Robert Zajonc rediscovered this early research, and (6) ____ that the temperature of the brain could affect the production and synthesis of neurotransmitters which definitely influence our moods and energy levels. He argues that an impaired blood flow could not only deprive the brain of oxygen, but create further chemical imbalance by inhibiting these vital hormonal messages. Zajonc goes on to propose that our brains remember that smiling is associated with being happy, and that by deliberately smiling through your tears you can (7) ____ your brain to release uplifting neurotransmitters – replacing a depressed condition with a happier one. People suffering from psychosomatic illness depression and anxiety states could (8) _____ from simply exercising their zygomatic (9) ____ which pull the corners of the mouth (10) ____ to form a smile, several times an hour.

The expression on your face can actually dramatically alter your feelings and perceptions, and it has been proved that (1) ____