Mitosis is when cells replicate themselves by splitting in half.
This only happens once, and thus A is false.
Meiosis is when cells split twice to make a total of four specialized sex cells, thus C is true.
It is meiosis, not mitosis, which divides chromosomes into sex cells, and thus B is false. These sex cells are used for the sole purpose of creating offspring; all other functions such as repairing wounds by creating new cells is all up to mitosis, and thus D is false.