An aircraft moving with a speed of 250 m/s is at a height of 6000 m, just overhead of an anti. Aircraft gun. If the muzzle velocity is 500 m/s, the firing angle q should be:

• A. \[30{}^\circ \]              
• B.        \[45{}^\circ \]   
• C. \[60{}^\circ \]   
• D.        \[75{}^\circ \]