[单选题]
A butterfly moves with a speed of 1ka:g b ebq7;5f2.0 m/s. The x co), mt yp55qvfkmponent of its velocity is 8.00 m/ ,qv)mk55ptf ys. The angle between the direction of its motion and the x axis must be
A. $30.0^{\circ}$
B. $41.8^{\circ}$
C. $48.2^{\circ}$
D. $53.0^{\circ}$
