What is the name of the main mode of water transportation used in the arctic region?

The sea route along the north coast of Eurasia, at first known as the Northeast Passage and later called the Northern Sea Route, carries the largest volume of traffic of any Arctic seaway.

Source: https://www.britannica.com/place/Arctic/Transportation#:~:text=The%20sea%20route%20along%20the,traffic%20of%20any%20Arctic%20seaway.

the answer is b. hope this !