How does GI motility change with age in males and females?

• A. Males' stomachs empty more slowly than females, and aging speeds GI motility.
• B. Gastric emptying is the same for males and females, and aging has no effect.
• C. Males' stomachs empty more rapidly, and aging increases motility.
• D. Males' stomachs empty more rapidly, females have slower gastric emptying, and aging decreases GI motility, increasing absorption time.

Answer: (D)