During the cell cycle, A. DNA is replicated before mitosis begins. B. DNA is replicated once before mitosis and again before cytokinesis. C. DNA is replicated directly after the completion of mitosis. D. DNA is replicated during mitosis.

The correct answer is A DNA is replicated before mitosis begins

Explanation:

DNA replication is one of the most significant event of a cell cycle ... DNA replication occur in the S phase or synthesis phase of the cell cycle.

DNA is replicated once per cycle to maintain to normal chromosome number in daughter cells.

DNA is replicated to form two new DNA molecules which are then equally distributed in each daughter cell during the mitosis phase.