why is there a bigger difference in temperature between January and July in Spokane than in Seattle

Spokane and Seattle are located in the state of Washington. Even though, Spokane is only 360 kilometers east of Seattle, there is a huge difference in temperature between January and July because of their distance from the pacific ocean.

The temperature of Spokane and Seattle is influenced by the pacific ocean and the Olympic mountains around. Seattle is closer to the pacific ocean and the olympic mountains that keep the cities temperature lower while Spokane’s are more continental and far from the pacific ocean and the Olympic mountains that makes its temperature rise more.

Hence, the temperature of Spokane and Seattle is influenced by marine position.

b is the right answer for this question.