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Gravitation or gravity is a natural phenomenon by which all things having mass are brought toward or gravitate toward one another, including stars and planets. Which of the following is the best example of gravitation or gravity?

A)  A car hits a tree and motion stops

B)  A breeze blows and a sailboat moves

C)  A person drops a ball and it falls to the ground

D)  A book is pushed and it moves across the table