Which map projection is often used to show polar regions?

Explanation:

In cartography, this type of projection involves azimuthal projection used to show Arctic and Antarctic areas.

An azimuthal projection we can define it as a map projection where all points on the map are proportionally equidistant from the center point.

the answer is d. tariffs were raised by america's trading partners after the smoot-hawley tariff act, decreasing exports, and declining job rates.