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Re: VITAMIN A DEFICIENCY [#permalink]
14 Nov 2010, 02:22
it is E because the plan is to "improve nutrition" (first line of argument). If the new sweet potato lacks imp. nutrients that the current variety has - then that may lead to other deficiencies ---> nutrition would not be improved. Thus, E fits right in.
D does not work - just coz the new variety of sweet potato is the richest source for Vit A does not mean it will help the plan to "improve nutrition."