**Core Concept**
Mitosis is a crucial cell division process in the development of male gametes, specifically spermatogonia. This process involves the replication of DNA and the division of the cell into two daughter cells with the same number of chromosomes.

**Why the Correct Answer is Right**
Spermatogonia undergo mitosis to proliferate and increase in number before entering meiosis. During mitosis, the replicated DNA is divided equally between the two daughter cells, ensuring that each cell receives a complete set of chromosomes. This process is essential for the production of a large number of spermatogonia that will eventually undergo meiosis to become mature sperm cells. The mitotic division of spermatogonia is a critical step in spermatogenesis.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because meiosis is a specialized type of cell division that occurs in the production of gametes, but it is not the type of cell division that spermatogonia undergo initially. Meiosis will occur later in the development of sperm cells.
* **Option B:** This option is incorrect because cytokinesis is the process of cell division that occurs after mitosis or meiosis, resulting in the physical separation of the cell into two daughter cells. It is not a type of cell division itself.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the development of male gametes involves two distinct cell division processes: mitosis and meiosis. Mitosis is responsible for the proliferation of spermatogonia, while meiosis occurs later to produce mature sperm cells.

**Correct Answer: A. Mitosis**