Final answer:
The average pH of the inside cells is near neutral, around 7.0, while the stomach environment is highly acidic, with a pH between 1 to 2. The correct choice that fits these values is Option C, stating 7.4 for inside cells and 1.5 for stomach pH.
Step-by-step explanation:
The question asks for the average pH of the inside of cells and the stomach. On the pH scale, which ranges from 0 to 14, substances with a pH below 7 are considered acidic, while those with a pH above 7 are alkaline. The pH inside most cells is just below neutral, at approximately 7.0. However, the stomach environment is highly acidic with a pH ranging from 1 to 2. Therefore, the correct answer to the question is:
Inside cells: Near neutral, around 7.0
Stomach: Highly acidic, between 1 to 2
Looking at the answer options given, the best choice that fits the averages provided in the references is Option C, which states the inside cells have a pH of 7.4 and the stomach has a pH of 1.5.