What effect does the concentration of $H^+_{(aq)}$ ions have on the nature of the solution?

• A
  Increase in $H^+$ concentration makes the solution more acidic.
• B
  Increase in $H^+$ concentration makes the solution more basic.
• C
  Decrease in $H^+$ concentration makes the solution more acidic.
• D
  Concentration of $H^+$ ions has no effect on the nature of the solution.