How does heat flow in air and ocean currents?

A. Colder water and air move towards warmer water and air
B. Warmer water and air move towards colder water and air
C. Air and Water flow in the direction of the Earth’s rotation
D. Air and Water always flow north

Astudy was interested in determining if eating milk chocolate lowered someone's cholesterol levels.ten people's cholesterol was measured. then, each of these individuals were told to eat 100g of milk chocolate every day and to eat as they normally did. after two weeks, their cholesterol levels were measured again. is there evidence to support that their cholesterol levels went down? how should we write the alternative hypothesis? (mud = the population mean difference= before - after)a. ha: mud = 0b. ha: mud > 0c. ha: mud < 0d. ha: mud does not equal 0