Here's a problem to solve: El Cajon Pass in California is becoming higher than the land around it at a rate of nearly 1 centimeter each year. Which statement is true about the area?

Among the 4 following options, which is the correct answer?

- A: Erosion is slower than uplift at El Cajon Pass.
 
- B: Plates are separating at El Cajon Pass.
 
- C: Mountain building is slower than erosion at El Cajon Pass.
 
- D: Erosion and uplift are balanced at El Cajon Pass.
 