The correct answer
Flexion
This is the movement when muscles contract reducing the angle of that joint. For instance, when ones biceps contract reducing the olecranon joints degree.
To start off a is something you should not even think of doing because you can die, for b that's not a good spot as in there can be extra skin coming from the chin, for c you are getting close but as your neck goes to your torso it gets bigger, D is the correct answer as you would get the most accurate measurement its not to close to the chin or your torso.<span />
