Which of the following statements best describes dietary fiber, its health benefits, and common food groups that are high in fiber?

• A. Dietary fiber consists mainly of non‑digestible plant carbohydrates that increase stool bulk and speed intestinal transit; high amounts occur in whole grains and some vegetables.
• B. Dietary fiber refers to indigestible plant components that support digestive health, help regulate postprandial blood glucose and LDL cholesterol, and are abundant in whole grains, fruits, vegetables, and legumes.
• C. Dietary fiber includes fermentable oligosaccharides and resistant starches that are metabolized by gut microbiota to produce short‑chain fatty acids, commonly found in legumes, cooked‑then‑cooled potatoes, and certain processed fiber‑enriched foods.
• D. Dietary fiber comprises soluble fibers that form viscous gels and may slow nutrient absorption; foods relatively high in this fraction include oats, barley, legumes, and some fruits.

Answer: (B)