If we could eliminate any disease in the North America, what would we pick if we wanted to most reduce the number of Americans living with long-term disability?
multiple sclerosis
Alzheimer's
heart attacks
strokes

What are the two causes of density in deep current waters? a. salinity (how much salt) of the water and high temperaturesb. salinity (how much salt) of the water and low temperatures c. oxygen content of the water and high temperatures. d. oxygen content of the water and low temperatures