**Core Concept**
Cranial growth and development are complex processes influenced by genetics, hormones, and environmental factors. The skull is composed of several bones that fuse together during childhood and adolescence, resulting in the adult skull shape.

**Why the Correct Answer is Right**
The greatest amount of cranial growth occurs during the **skeletal growth spurt**, which typically peaks between 10-14 years of age in girls and 12-16 years of age in boys. This period is characterized by rapid growth and development of the long bones, including those of the skull. The growth of the cranial bones is driven by the activity of osteoblasts, which are responsible for bone formation, and osteoclasts, which resorb bone tissue. The growth plates in the skull bones, particularly the sutures, allow for the expansion and molding of the skull.

**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify the correct age range for the greatest amount of cranial growth.
* **Option B:** This option is incorrect because it does not accurately describe the period of rapid cranial growth.
* **Option D:** This option is incorrect because it is too vague and does not provide a specific time frame for cranial growth.

**Clinical Pearl / High-Yield Fact**
The closure of the cranial sutures is an important milestone in cranial growth and development. Premature closure of the sutures can result in conditions such as craniosynostosis, which can lead to abnormal skull shape and increased intracranial pressure.

**Correct Answer: C. During the skeletal growth spurt between 10-16 years of age.**