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Incomparisonwithourancestors,thesortoffoodweeattodaycontainsverylittlefibre.Ourmainfoodsaremeat,eggsanddairyproducts,whichcontainsnofibreatall.Comparedwiththatofourancestors,ourdiettendstolack_____.

题型：单选题

选项

A. vitamins.

B. fibre.

C. minerals.

D. calories.

正确答案：