It covers around 1,200,000 square miles.
https://www.britannica.com/place/West-Siberian-Plain
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I did my research on this question. It would be... D
“The southern portion of the Pacific coast—particularly southern California—can be influenced by maritime tropical air masses, abbreviated mT. These warm, moist air masses originate in the subtropical Pacific Ocean. They may bring fog or low clouds with them.”
Answer:
West
Explanation:
It's on the western side of North America
