11. The grass lands do not flourish if there is no animal feed on grass. Most of monocot plants are taken over by dicots. Which of the following statements is the most likely reason? (A) Monocot roots have weaker adsorption of nutrients. (B) Without animal, monocot roots expand too quickly and cause depletion of nutrients. Then, whole population will be extinct. (C) Monocot will grow too tall, and will be destroyed by typhoon. (D) Monocots are light sensitive, and need animals to protect them avoid UV irradiations. (E) Dicots have fibrous roots to compete more nutrients.