Many gyms feature weightlifting machines called "adductor machines" that are used to strengthen the thighs. If you were to work out on one of these, what would you be doing?
A) twisting both thighs to the left, then to the right
B) lifting both thighs upward
C) pushing both thighs outward, separating your knees as far as you can
D) pulling both thighs inward toward a center point, bringing your knees together
E) None of the answers is correct.
Answer: D
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Fill in the blank(s) with the appropriate word(s).