[单选题]
At what rate is the ,c81sl kno1ot v b.iktjio bl-p3 807 5co gk:wv2cild1hi.v.human body radiating energy when it 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. $900 \; W$
