**Core Concept**
The human cranium, or skull, undergoes significant growth and development throughout childhood and adolescence. This growth is driven by the expansion of soft tissues such as bone, cartilage, and connective tissue, which eventually ossify to form the adult skull.

**Why the Correct Answer is Right**
The growth of the cranium continues until the late teenage years, with the majority of growth occurring during the first two decades of life. This is due to the ongoing development of the brain, which requires a corresponding increase in cranial capacity. The growth of the cranium is influenced by the growth of the brain, and it is estimated that the brain reaches its full size by around 15 years of age. The cranial sutures, or fibrous joints, which hold the bones of the skull together, remain open until this age, allowing for continued growth and expansion of the cranium.

**Why Each Wrong Option is Incorrect**
* **Option A:** The growth of the cranium does not cease at 2 years of age, as significant growth and development continue throughout childhood and adolescence.
* **Option B:** While the growth of the cranium does slow down after the age of 10, it does not completely stop, and continued growth is necessary to accommodate the development of the brain.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that the growth of the cranium is closely linked to the growth and development of the brain. This is why conditions that affect brain growth or development, such as hydrocephalus or craniosynostosis, can have significant implications for cranial growth and development.

**✓ Correct Answer: C. 15 years**