Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information. A. A tree will usually shed branches that use more carbohydrate than they produce. B. Branches that are shaded usually do not receive enough light to produce all the carbohydrate they need. C. If a tree gets rid of a branch, it is usually because other branches lack enough carbohydrate to subsidize it. D. If a branch is shaded and cannot produce as much carbohydrate as it needs, it will usually be subsidized by other branches.