[单选题]
A 30.0-N stone is dropped from a heigo2 oriz,h4jvm+7m 4 doht of 10.0 m, and *,pfb7dtey9j2q lg7qw e/8r lstrikes the ground with a velocity of 7.00 m/s. What average force of air friction acts onfejdtl8*gb2p7y/, wqrq 97le it as it falls?
A. $22.5 \; N$
B. $75.0 \; N$
C. $225 \; N$
D. $293 \; N$
