[单选题]
At what rate is the humaa7wds d;f4y;ze /,gxon body radiating energy when it.,4u rxvlzt*b is at $33 \; ^{\circ}C$? Take the body surface area to be $1.4 \; m^{2}$, and approximate the body as a blackbody.
A. $600 \; W$
B. $700 \; W$
C. $800 \; W$
D. $900 \; W$
