Amalgams are

Options

A. alloys which contain carbon
B. alloys which have great resistance to abrasion
C. alloys which contain mercury as one of the contents
D. highly coloured alloys

Explanation

### Step-by-Step Solution:

1. **Understanding Amalgams**:
- Amalgams are a specific type of alloy. An alloy is a homogeneous mixture of two or more elements, where at least one of the elements is a metal.

2. **Analyzing the Options**:
- We are given four options to identify what amalgams are:
- A) Alloys which contain carbon
- B) Alloys which have great resistance to vibrations
- C) Alloys which contain mercury as one of the contents
- D) Highly colored alloys

3. **Evaluating Option A**:
- Amalgams do not contain carbon. Carbon is a non-metal, and amalgams are specifically mixtures of metals. Therefore, this option is incorrect.

4. **Evaluating Option B**:
- The statement that amalgams have great resistance to vibrations is not accurate. Amalgams are not specifically known for this property. Therefore, this option is also incorrect.

5. **Evaluating Option C**:
- Amalgams are indeed alloys that contain mercury as one of the components. They are formed when mercury combines with other metals. This option is correct.

6. **Evaluating Option D**:
- Amalgams are generally not highly colored; they tend to have a silvery appearance due to the presence of mercury. Therefore, this option is incorrect.

7. **Conclusion**:
- The correct answer is Option C: Amalgams are alloys which contain mercury as one of the contents.