Barbara completed an assignment for extra credit in science class. She used a pH meter to find the pH of different substances. After she finished measuring the pHs, she created a diagram that showed the substances arranged in order from the most acidic to the most basic. If Barbara added baking soda—pH 8.4—to her investigation, where should it appear in her diagram? A. between blood and soap B. between soap and bleach C. between milk and water D. between water and blood