An acid-base indictor has K b of 1.0 × 10⁻⁵ . The acid form of the indicator is red and the basic form is blue. Then: A. pH is 8.4 when indicator is 80% red B. pH is 9.6 when indicator is 80% blue C. pH is 9.6 when indicator is 80% red D. ph is 8.4 when indicator is 80% blue