The Figure Shows a Person's Foot

Multiple Choice

The figure shows a person's foot.In that figure,the Achilles tendon exerts a force of magnitude F = 720 N.What is the magnitude of the torque that this force produces about the ankle joint?

A) 12 N ∙ m
B) 16 N ∙ m
C) 21 N ∙ m
D) 26 N ∙ m
E) 36 N ∙ m