Physics- Accleration of a Falling Penny

A visitor to the observation deck of a skyscraper manages to drop a penny over the edge. As the penny falls faster, the force due to air resistance increases. How does this affect the acceleration of the penny?
a. The acceleration decreases
b. The acceleration remains constant and not zero (my answer)
c. The acceleration remains zero
d. The acceleration increases.

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  1. if the force increases (more upward) the the net downward force must decrease.

    So, (a) since F=ma

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  2. google terminal velocity

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