A 240 N Picture Hangs from a Nail in the Wall

Multiple Choice

A 24.0 N picture hangs from a nail in the wall.The diameter of the nail is 2.00 mm.The shear stress on the nail is

A) 7.64 $\times$ 10⁶ N/m².
B) 6.24 $\times$ 10⁶ N/m².
C) 5.65 $\times$ 10⁶ N/m².
D) 4.37 $\times$ 10⁶ N/m².
E) 4.02 $\times$ 10⁶ N/m².