Review the text.
Named after Gustave Coriolis, a nineteenth-century mathematician, the Coriolis effect is caused by Earth's rotation. As wind and ocean currents move across Earth's surface, the planet itself is rotating from west to east. As a result, the currents appear to travel along a curved path instead of a straight one. Wind and water currents traveling from the equator toward the poles bend eastward, while currents traveling from the poles toward the equator bend westward. The Coriolis effect explains why hurricanes spin counterclockwise in the Northern Hemisphere and clockwise in the Southern Hemisphere.
Which best shows that the author's purpose is to introduce readers to the Coriolis effect?
A. The author provides facts about the Coriolis effect, such as its causes and its effects.
B. The author provides details about Gustave Coriolis, such as the century in which he lived.
C. The author reminds readers that Earth rotates from west to east.