The correct answer is D) the puck is moving very quickly.
The statement that best interprets the meaning of the metaphor in the sentence is "the puck is moving very quickly."
Metaphor is a figure of speech. It allows people to describe or compare actions, moments, or individuals in a way that is not true, literary speaking. The metaphor compares two things for the sake of the symbolism that represents.
So in this case, when the sentence reads "...transforming it into a missile heading straight to the goal," the author is comparing the speed of the puck with a missile, trying to express that the puck is moving very quickly, as "the speed of a missile."