[单选题]
A brick weighs 50.0 N, and mk .mk :qr kz9hmu2un7;easurecrx ww 0a700ow2iu2t pdx lm)oc:qt:-u/kc 1es 30.0 cm x 10.0 cm x 4.00 cm. What is the maximum pressure it can exert on a horizontal su ixw2ow o )rct-l1wae0u/ c0k07xtq2c::dpmurface?
A. $1.25 \; Pa$
B. $12.5 \; Pa$
C. $1.25 \; kPa$
D. $12.5 \; kPa$
