Two chyme samples are taken: one from the stomach and one from the duodenum. How could you tell the samples apart using lab techniques?

• A. Test for the presence brush border enzymes; the duodenal chyme will contain brush border enzymes while the stomach chyme will not.
• B. Test for the presence of bile salts; the stomach chyme will contain bile salts, but the duodenal chyme will not.
• C. Test the pH of each solution; the stomach chyme will be more acidic than the duodenal chyme.
• D. Test for the presence of starch; starches are digested in the stomach, so only simple sugars are present in the small intestine.