[单选题]
A 400-m tall tower casts a 600-m long shadow over a level ground. A :e r0vd +k5qfspvuvj+: jmp:wt0 ;h*kt wh7gaqi0 y6rsp:h )x1mx at angle is the Sun x17q:0gix ah6y s rp)melevated above the horizon?
A. $34^{\circ}$
B. $42^{\circ}$
C. $48^{\circ}$
D. can't be found; not enough information
