The Two Largest Competitors in the Smart Television Market Have

The two largest competitors in the smart television market have been accused of making an agreement to divide the country in half, where Company A will only sell in the western half of the country, and Company B will only sell in the Eastern half of the country. If proven to be true, this would be an example of a(n)

A) territorial restriction
B) coordinated sales market reduction
C) vertical restraint on trade
D) horizontal division of markets
E) horizontal restraint on trade