What is the change in length of the combined brass and steel rod when heated from 40.0 °C to 250 °C, and is there a 'thermal stress' developed at the junction?

Options

1. AThe length increases by 0.008 cm, and there is no thermal stress.
2. BThe length increases by 0.355 cm, and there is thermal stress.
3. CThe length increases by 0.346 cm, and there is no thermal stress.
4. DThe length increases by 0.016 cm, and there is thermal stress.