Which of these sets of subjects are most appropriate for a compare and contrast essay? Select one:
a. classic cars and snowboards
b. animals in Antarctica and people of Greenland
c. music of the 1950s and music of the 1990s
d. radio programs and large cities

what excerpt?

explanation:

the direction of the magnetic field produced by an electric current will change when the direction of the electric current changes. for example : if a current is flowing in a straight length of wire, the magnetic field is described by a concentric circle (using right-hand rule).

i think idk if im right but i think its d