C. Meiosis begins with a diploid cell but produces four haploid cells.
The statement "Meiosis begins with a diploid cell, but produces four haploid cells" explains why meiosis is a reduction division. The cell divides twice during meiosis, resulting in the creation of four daughter cells. These daughter cells are genetically distinct from the parent cell and contain half the number of chromosomes (haploid) as the parent cell.