Which of the following parts of North America contains many terranes accreted to the edge of the continent in the past 200 million years?

Question

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The western part of North America, particularly the Pacific Northwest region, contains many terranes that have been accreted to the edge of the continent over the past 200 million years. This is due to the subduction of the Pacific Plate under the North American Plate, which has resulted in a complex and diverse geologic history in this region. The northeast and southeast regions do not have as many terranes that have been accreted in recent geologic history.

Which of the Following Parts of North America Contains Many