[单选题]
A 400-m tall tower cb.c 5o8)i9k rbf.j.4yp nu- qvbd2uy aasts a 600-m long shadozsf9fmv6l:pll +1 xlhf *qn0; w over a level ground. At what angle is the Sml+xf;lph 1 9f0q*s:lzvlf6nun elevated above the horizon?
A. $34^{\circ}$
B. $42^{\circ}$
C. $48^{\circ}$
D. can't be found; not enough information
