The value of $x$ is to be found using the equation $x = P - Q$. $P$ is recorded as $1.27 \pm 0.02\,\text{m}$. $Q$ is recorded as $0.83 \pm 0.01\,\text{m}$. Calculate the percentage uncertainty in $x$ to one significant figure.
- A$0.4\%$
- B$2\%$
- C$3\%$
- D$7\%$