Which of the Following Statements Are True of PH and Solutions

Which of the following statements are true of pH and solutions (Select all that apply) ?

A) A solution with a pH of 7 is considered neutral.
B) Only a pH of 8 or higher is alkaline.
C) The entire pH scale ranges from 1 to 15.
D) As the number of H+ ions in a solution increases,so does the pH value.
E) A solution with a pH of 4 is four times as acidic as a solution with a pH of 1.
F) The pH of the blood is important for the chemical reactions that take place in the blood.
G) A body fluid such as gastric juice has the same pH range as blood because both are extracellular fluids.
H) Among the organs that help regulate the pH of the blood are the kidneys.