[单选题]
A hot air balloon risesctui9 ).je:g t to alkd( qv73pk*tab:rf itf*2p(nm 1v;pn altitude of 600 fathoms. What is this height, in feet k*7:k(p1f3i b av*vrmq2 ltdnfp;( pt? ($1 \; fathom = 6 \; ft$)
A. $100 \; ft$
B. $600 \; ft$
C. $1200 \; ft$
D. $3600 \; ft$