A Steel Plane Truss Is Loaded at B and C $A=3970 \mathrm{~mm}^{2}$

A steel plane truss is loaded at B and C by forces P = 200 kN. The cross-sectional area of each member is $A=3970 \mathrm{~mm}^{2}$ . Truss dimen-
Sions are H = 3mand L = 4m. The maximum shear stress in bar AB is
Approximately: (A) $27 \mathrm{MPa}$
(B) $33 \mathrm{MPa}$
(C) $50 \mathrm{MPa}$
(D) $69 \mathrm{MPa}$