## **Core Concept**
The question revolves around the management of a specific type of cancer, **embryonal rhabdomyosarcoma**, which is a subtype of soft tissue sarcoma commonly found in children. This cancer type often presents with proptosis due to its orbital involvement. The standard treatment approach involves a combination of therapies.

## **Why the Correct Answer is Right**
Embryonal rhabdomyosarcoma is highly aggressive but also highly responsive to treatment. The standard line of treatment for orbital rhabdomyosarcoma, especially in children, involves **chemotherapy** and **radiotherapy**. Surgery may be used in certain cases but is not the primary treatment due to the tumor's location and the need to preserve vision and facial structures. The correct approach often includes **chemotherapy** as the initial treatment to shrink the tumor, followed by **radiation therapy** to control local disease. This combined modality approach helps in achieving a better outcome.

## **Why Each Wrong Option is Incorrect**
- **Option A:** This option might suggest surgery alone, which is not the standard for embryonal rhabdomyosarcoma due to its aggressive nature and the importance of preserving vision.
- **Option B:** This could imply radiation alone, which might not be sufficient given the systemic nature of the disease and the need for local and distant control.
- **Option D:** This might suggest a more passive approach or an approach not commonly used for this condition.

## **Clinical Pearl / High-Yield Fact**
A key point to remember is that **embryonal rhabdomyosarcoma** is a **chemotherapy-sensitive tumor**. Early and aggressive treatment with chemotherapy and radiotherapy can significantly improve outcomes and preserve vision. The goal is to achieve complete remission while minimizing long-term side effects.

## **Correct Answer:** C.