Snapping your fingers involves what movement of the thumb?
A) Snapping involves retraction at the thumb and protraction at the third metacarpophalangeal joint.
B) Snapping involves protraction at the thumb and retraction at the third metacarpophalangeal joint.
C) Snapping involves opposition at the thumb and extension at the third metacarpophalangeal joint.
D) Snapping involves opposition at the thumb and flexion at the third metacarpophalangeal joint.
E) Snapping involves opposition at the thumb and inversion at the third metacarpophalangeal joint.
Answer: D
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