[单选题]
Which of the following /( k*tesirq .bstatements about pkxsmk)g. 2e-k +4lv pjH is incorrect?
A. pH cannot be negative
B. The pH of pure water changes with temperature
C. As the pH increases, the concentration of $H^+$ decreases
D. There is a non-linear relationship between pH and $[H^+]$