The Northern Plain exhibits variations in its dimensions. Which of the following statements accurately reflects these variations?
AThe plain narrows from east to west and has a uniform width of 200 km
BThe plain widens from east to west, with its width varying between 150 km and 300 km.
CThe plain has a consistent width of 300 km and extends for 2400 km.
DThe plain's width decreases from west to east, ranging from 300 km to 150 km.