One geographic factor that influences climate is latitude, or the distance north and south of the equator. Latitude is measured in degrees and divides the globe into three main climatic regions: tropical, temperate and polar. The tropical zone is the region closest to the equator; think of it as a belt that extends from the Tropic of Cancer (23.5° north of the equator) to the Tropic of Capricorn (23.5° south of the equator). The tropical zone receives direct sunlight all year round, so its climate is sunny and hot. The polar zones are the regions that surround the North and South Poles, extending from the poles to 60° north and 60° south of the equator. They receive little direct sunlight and have a frigid climate. In between the tropical and polar zones are the temperate zones. These regions have more moderate climates that vary with the seasons. Based on the passage, which of the following is correct?

A) There is only one polar zone on Earth.

B) The sun reaches all areas of Earth equally.

C) The polar zone extends to the Tropic of Capricorn.

D) The northern temperate zone extends from 60° to 23.5° north of the equator.