A good fuel

Options

A. should have low calorific value
B. should cause pollution
C. should have high ignition temperature
D. should be easy to transport.

Explanation

### Step-by-Step Solution:

1. **Understanding the Definition of a Good Fuel**:
A good fuel is one that provides a high amount of energy when burned, has low pollution emissions, and is easy to handle and transport.

2. **Calorific Value**:
The calorific value is the amount of heat produced when 1 kg of fuel is completely burned. A good fuel should have a **high calorific value** because this means it releases a lot of energy.

3. **Pollution**:
A good fuel should not cause pollution. Fuels that emit harmful substances when burned are not considered good fuels. Therefore, a good fuel should ideally cause **no pollution**.

4. **Ignition Temperature**:
The ignition temperature is the minimum temperature at which a fuel starts to burn. A good fuel should have a **moderate ignition temperature**. This means it should not be too high (which would make it difficult to ignite) or too low (which could lead to accidental ignition).

5. **Transportability**:
A good fuel should be **easy to transport**. This means it should be safe to handle and should not pose significant risks during transportation.

6. **Conclusion**:
Based on the properties discussed, the characteristics of a good fuel are:
- High calorific value
- No pollution
- Moderate ignition temperature
- Easy to transport

Therefore, the correct option regarding the properties of a good fuel is that it should be **easy to transport**.