[单选题]
A person weighing 800 N e0l:0xhvc .xi stands with one foc. xe3 fb)vwz:ot on each of two bathroom scales. Which statebf:)z wc e.v3xment is definitely true?
A. Each scale will read 800 N.
B. Each scale will read 400 N.
C. If one scale reads 500 N, the other will read 300 N.
D. None of the above is definitely true.