Epidemics of polio and measles used to be common in the United States. Now they are rare. What is the best explanation for this? (Group of answer choices)

A. water monitoring and treatment

B. widespread vaccination

C. insecticides that kill transmitting pests

D. careful use of antibiotics

he uptake of drugs from the intestine is often strongly influenced by diffusion. for example, consider a water-insoluble steroid for treating inflammation that is solubilized in aggregates of detergent molecules, called micelles. these micelles, aggregates of 80 soap molecules, have a molecular weight of 24,000, a diameter of 2.6 nm, and a charge of -27. the positively charge ions (counterions) in this system are na".