A thermometer may be read with an accuracy of $\pm 0.5^\circ\text{C}$. It is used to measure a rise in temperature from $40^\circ\text{C}$ to $100^\circ\text{C}$. What is the percentage uncertainty in the measurement of the temperature rise?
- A$0.5\%$
- B$0.8\%$
- C$1.3\%$
- D$1.7\%$