Which of the following statements is true about infectious diseases in developing countries?
A) Illnesses such as measles and chicken pox typically do not appear until age 3.
B) Most developmental impairments and death due to diarrhea can be prevented with nearly cost-free oral rehydration therapy (ORT).
C) Since 1990, public health workers have taught about 10 percent of the families in the developing world how to administer ORT.
D) The majority of children in the world's poorest countries—such as Chad, Morocco, Somalia, and Togo—receive ORT.
B
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