Design a one-day meal plan outline targeted to increase soluble and insoluble fiber intake for a patient aiming to go from 10 g/day to ~30 g/day, listing specific foods and approximate fiber contributions that demonstrate application of fiber mechanisms.

• A. Breakfast: multigrain cereal (2 g); Lunch: white rice bowl with grilled fish (1 g); Snack: yogurt (0 g); Dinner: baked potato with butter (1 g). Total ≈4 g — focuses mainly on fermented dairy to modulate microbiome as the primary pathway rather than fiber intake.
• B. Breakfast: buttered white toast with jam (0.5 g); Lunch: fried chicken with mashed potatoes (1 g); Snack: plain crackers (0.5 g); Dinner: steak with creamed spinach (1 g). Total ≈4 g — emphasizes avoiding whole grains and legumes because they irritate the colon and disrupt beneficial bacteria, a recommended approach to prevent colorectal cancer.
• C. Breakfast: 1/2 cup high-fiber oatmeal (4 g) with 1 tbsp chia seeds (5 g) and a medium banana (3 g); Lunch: large salad (mixed greens, chickpeas 1/2 cup = 6 g) and whole-grain roll (3 g); Snack: 1 apple (4 g); Dinner: 1 cup cooked broccoli (5 g) and 1/2 cup brown rice (2 g). Total ≈32 g — combines soluble and insoluble fiber to bulk stool, speed transit, and feed microbiota.
• D. Breakfast: fruit smoothie made from juice concentrate with added sugar (0 g); Lunch: salad with only iceberg lettuce (0.5 g); Snack: processed granola bar labeled as 'low-residue' (1 g); Dinner: pasta with cream-based sauce and peeled vegetables (1 g). Total ≈2.5 g — relies on supplements only since dietary fiber is ineffective unless consumed at doses above 100 g/day.

Answer: (C)