**Core Concept**
The growth rate of children is a critical aspect of pediatric care, and understanding the normal growth patterns is essential for diagnosing and managing growth disorders. In children aged 2-10 years, the growth rate is influenced by various factors, including genetics, nutrition, and overall health.

**Why the Correct Answer is Right**
The correct answer is based on the average annual growth rate of children in this age group. According to the Centers for Disease Control and Prevention (CDC) growth charts, children typically grow at a rate of about 2-3 inches (5-7.5 cm) per year during early childhood, with a slightly faster rate of growth during the prepubertal period. However, the most accurate estimate for children aged 2-10 years is an increase in height of approximately 6 cm per year. This growth rate is influenced by the rapid development of bone and cartilage, as well as the increasing length of long bones.

**Why Each Wrong Option is Incorrect**
**Option A:** 2 cm/year is too low for children aged 2-10 years, as this growth rate would result in a significantly shorter stature than expected for age.
**Option B:** 4 cm/year is closer to the actual growth rate but still underestimates the expected increase in height for children in this age group.
**Option D:** 10 cm/year is excessively high and would result in an abnormally tall stature for children aged 2-10 years.

**Clinical Pearl / High-Yield Fact**
It's essential to remember that growth rates can vary significantly among children, and any significant deviation from the expected growth rate should prompt further investigation for underlying causes.

**✓ Correct Answer:** C. 6 cm/year