Of the answers given here, the best is D.
When the velocity of money increases, each dollar (or other currency) is spent more often. The money circulates more quickly through the economy. This means that the same amount of money is supporting more transactions. This makes A and C incorrect.
If each dollar is spent more often, this means that more goods and services are being bought. If more goods and services are bought, then (all other things being equal) nominal gross domestic product will rise. Therefore, D is the best answer to this question.