A Projectile Is Shot Upwards from the Surface of the Earth

Multiple Choice

A projectile is shot upwards from the surface of the earth with an initial velocity of 136 meters per second.The position function is . ​
What is its velocity after 6 seconds?
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A) The velocity after 6 seconds is 242.6 meters per second.
B) The velocity after 6 seconds is -165.4 meters per second.
C) The velocity after 6 seconds is 77.2 meters per second.
D) The velocity after 6 seconds is 106.6 meters per second.
E) The velocity after 6 seconds is -194.8 meters per second.