[单选题]
A 400-m tall tower c4jy:b*bmb +r aastl0gf(a0c x2d is-)g zsxh8yz,s a 600-m long shadow over a level ground. At what angle is t -s8c2 f)yig ,h 0dlaxsxzz(0ghe Sun elevated above the horizon?
A. $34^{\circ}$
B. $42^{\circ}$
C. $48^{\circ}$
D. can't be found; not enough information
