Which of the following accurately pairs the phase of the cell cycle with its primary purpose?

According to a source, the answer is A. M phase–Cell growth before DNA replication.

Mitosis is the cell division that happens in all cells in the human body except sperm and egg cells. They produce diploid cells. Meiosis on the other hand is responsible for the cell division of the gametes, spermatogenesis (sperm cells) and oogenesis (egg cells), such haploid cells. Take for instance your integumentary system, layer of the skin in which your stratum basale always produces new epithelial cells (via mitosis) to take over until the outer layer, called stratum corneum (a continous replaced dead cells in this layer). 

The answer is c : ) hope this answered your question!

Nucleus is the organelle that contains chromosomes