48. The author implies that there is cause for concern if consumers with limited incomes buy organic foodsinstead of conventionally grown foods because _______________.
(A) organic foods can be more expensive but are often no better than conventionally grown foods
(B) many organic foods are actually less nutritious than similar conventionally grown foods
(C) conventionally grown foods are more readily available than organic food
(D) too many farmers will stop using conventional methods to grow food crops