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

In some states, medical marijuana is legal. this means that people who need to take marijuana because of a medical condition may take it only with approval from the doctor. however, officers still advise these people not to drive while under the influence. what is the main reason for this? they would become dangerous to themselves and other people. they would not able to read and follow street signs. they would not be capable of staying in only one lane. they would become dangerous to wildlife that may be present.

How does fluid in the body become lymph? how is it returned to your blood

Curology what technique are the advertising using?