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The vertical motion of a mass hanging from a spring is modeled by the equation y=4⋅cos(2t),y=4⋅cos⁡(2t), where y is the vertical height of the mass, and t is the time, in seconds. What is the period of the motion of the mass?

A. 2 seconds

B. π seconds

C. 4 seconds

D. 2π seconds

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