The Moment Reaction at a in the Plane Frame Below $+1400 \mathrm{~N} \cdot \mathrm{m}$

The moment reaction at A in the plane frame below is approximately: (A) $+1400 \mathrm{~N} \cdot \mathrm{m}$
(B) $-2280 \mathrm{~N} \cdot \mathrm{m}$
(C) $-3600 \mathrm{~N} \cdot \mathrm{m}$
(D) $+6400 \mathrm{~N} \cdot \mathrm{m}$