In trick-taking games, cards are compared and
a. a player determines the next trump.
b. the cards are moved to the winner's side.
c. all cards valued 2 through 6 are removed.
d. the game continues until all cards are used.

The right answer for the question that is being asked and shown above is that: "d. the game continues until all cards are used." In trick-taking games, cards are compared and the game continues until all cards are used. That is the correct answer.