Which of the following terms describes the straightening of a joint, rather than the bending?
a. flexion
b. hyperextension
c. extension
d. none of the above

The correct answer is C. Extension

Extension refers to the straightening of a joint. Flexion refers to the bending of the joint. Hyperextension refers to an exercise that works for the lower back. So the correct answer would be extension. I hope these definitions helped you find the correct answer. 

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