[单选题]
Which of the followingd4a qemp:8rdha 9 h*q4 statemeic:caka*) jobzi((:j nts about pH 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 $[H^+]$