Which of the following applications of copper require refining of copper instead of alloying?

Options

A. Making statues.
B. Making household utensils.
C. Making shells of ammunitions.
D. Making electric transmission cables.

Explanation

To determine which application of copper requires refining instead of alloying, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding the Concept of Refining and Alloying**:
- **Refining**: This process involves purifying copper to obtain pure copper metal. Pure copper is essential for certain applications due to its high conductivity.
- **Alloying**: This involves mixing copper with other metals to create alloys that have improved properties, such as strength or corrosion resistance.

2. **Analyzing Each Application**:
- **Making Statues**: Statues can be made from various materials, including alloys. There is no strict requirement for pure copper, as the aesthetic and structural properties can be achieved with alloys.
- **Making Household Utensils**: Household utensils are often made from brass (an alloy of copper and zinc) or other copper alloys. Therefore, this does not require pure copper.
- **Making Shell of Ammunition**: Ammunition shells often use gunmetal, which is an alloy of copper, tin, and zinc. Hence, this application does not require refining.
- **Making Electric Transmission Cables**: Electric cables require high conductivity, which is best achieved with pure copper. Therefore, refining is necessary to obtain the pure copper needed for this application.

3. **Conclusion**:
- The application of copper that requires refining instead of alloying is **Making Electric Transmission Cables**.

### Final Answer:
The application of copper that requires refining instead of alloying is **Making Electric Transmission Cables**.

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