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

Multiple Choice

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) $+ 6400 \mathrm {~N} \cdot \mathrm { m }$