Which statement best describes the difference between a substance with a pH of 3.0 and a substance with a pH of 6.0?\
A. The substance with the higher pH has 1,000 times as many hydrogen ions per volume of water.
B. The substance with the lower pH has 1,000 times as many hydrogen ions per volume of water.
C. The substance with the lower pH has twice as many hydrogen ions per volume of water.
D. The substance with the higher pH has twice as many hydrogen ions per volume of water.