The acidity or alkalinity of a solution is measured using a logarithmic scale called the pH scale. A solution that has a pH of 7 is neutral. For each increase of 1 pH, a solution is 10 times as alkaline. For each decrease of 1 pH, a solution is 10 times as acidic. A sample of rainwater has a pH of 4.3. A sample of blood has a pH of 7.3. Which sample is more acidic? How many times as acidic is the sample? Select the correct choice below and fill in the answer box to complete your choice. (Give your answer to the nearest whole number.) O A. The sample of blood is more acidic. It is approximately times as acidic as the sample of rainwater. O B. The sample of rainwater is more acidic. It is approximately times as acidic as the sample of blood