**Core Concept**
Ewing's sarcoma is a rare and aggressive type of bone cancer that primarily affects children and young adults. It is a malignant tumor of bone or soft tissue that arises from primitive neuroectodermal cells. The peak incidence of Ewing's sarcoma is crucial for diagnosis and treatment planning.

**Why the Correct Answer is Right**
The correct answer is related to the epidemiological characteristics of Ewing's sarcoma. Ewing's sarcoma predominantly affects children and young adults, with a peak incidence typically observed between 10 to 20 years of age. This age range is critical for early diagnosis and treatment, as it significantly influences the prognosis and survival rates of patients with Ewing's sarcoma.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect because it is too broad and does not accurately represent the age range associated with Ewing's sarcoma.
**Option B:** This option is incorrect because it is too narrow and does not account for the full age range of patients affected by Ewing's sarcoma.
**Option C:** This option is incorrect because it is not supported by the established epidemiological data on Ewing's sarcoma.

**Clinical Pearl / High-Yield Fact**
It is essential for clinicians to be aware of the peak incidence of Ewing's sarcoma to promptly diagnose and initiate treatment in young patients. Early diagnosis and intervention significantly improve the prognosis and survival rates of patients with Ewing's sarcoma.

**Correct Answer:** C.