A Plane Is Flying Horizontally at a Height of 500 $\times$

Multiple Choice

A plane is flying horizontally at a height of 500 m and a constant speed of 429 km/h when an object is projected vertically downward at an initial speed of 35.0 m/s.If air resistance is neglected,the average vertical component of velocity between the object's release and its striking the ground is

A) 70.0 m/s
B) 5.50 $\times$ 10³ m/s
C) 140 m/s
D) 105 m/s
E) 35.0 m/s