After reading the paragraph below, answer the questions that follow.
You've been experiencing acid indigestion lately, and you'd like a quick fix for the problem. You do a little research on the Internet and discover that your problem is caused by excess stomach acid. In the pharmacy aisles, however, you're having a little trouble deciding what to purchase to address the problem. At the pharmacy counter, the clerk recommends that you purchase PEPCID AC or Alka-Seltzer tablets.
You want to design an experiment to compare the effectiveness of Pepcid AC tablets and Alka-Seltzer tablets. Which of the following facts would be least likely to complicate your experiment and the analysis of your results?
◦ PEPCID AC and Alka-Seltzer tablets are sold in different countries throughout the world.
◦ The recommended dosage for PEPCID AC and Alka-Seltzer tablets is different.
◦ PEPCID AC and Alka-Seltzer tablets contain different concentrations of the antacid drug.
◦ PEPCID AC and Alka-Seltzer tablets contain different ingredients.
Acid–base imbalances.
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