The resistance of a resistor changes in direct proportion to temperature, as the graph shows. Which statement is correct?
- AWhen immersed in boiling water, the resistance is $120\,\Omega$.
- BThe resistance at the lower fixed point is $80\,\Omega$.
- CWhen the resistance is $100\,\Omega$ the temperature is $120\,^\circ\text{C}$.
- DThe resistor can only be used at temperatures between $0\,^\circ\text{C}$ and $100\,^\circ\text{C}$.