[Same scenario as Problem #5] An object thrown vertically upward from the surface of a celestial body at a velocity of 12 meters per second reaches a height of s(t) = −6t² + 12 meters in t seconds. Determine the velocity with which the object strikes the ground. [A] 24 m/s [B] -24 m/s [C] 16 m/s [D] -16 m/s [E] -12 m/s

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