The Angle of Rotation Between the Ends of a Nylon $0.15 \mathrm{~m}$

The angle of rotation between the ends of a nylon bar is 3.5 °. The bar diameter is 70 mm and the allowable shear strain is 0.014 rad. The
Minimum permissible length of the bar is approximately: (A) $0.15 \mathrm{~m}$
(B) $0.27 \mathrm{~m}$
(C) $0.40 \mathrm{~m}$
(D) $0.55 \mathrm{~m}$