The Indicator Phenol Red Changes from Yellow to Red Between

Multiple Choice

The indicator phenol red changes from yellow to red between pH 6.8 and pH 8.4. If phenol red is added to a solution, and the solution turns red, then

A) the solution is basic, and the pH must be at or below 7.0.
B) the pH of the solution must be below 6.8, and the solution is basic.
C) the pH of the solution must be below 6.8, and the solution is acidic.
D) the pH of the solution must be above 8.4, and the solution is basic.
E) the pH of the solution is above 8.4, and the solution is acidic.