Which of the following would be the most cost-effective approach to achieving improvements in hygiene and sanitation in a low-income, developing country?
a. Promoting a community-based hand washing campaign
b. Building a piped water supply system
c. Building a sewer system
d. None of the above are cost-effective
Answers: 1
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Which of the following would be the most cost-effective approach to achieving improvements in hygien...
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