The right answer is D. To prevent snow build-up.
The slanted roof masonry was a technique popularly used in the Russian architecture in the 16th and 17th centuries. The development of a slanted roof could only be possible because of the use of the quadrant arch, imported from North Western Europe. Before that time tented roofs (conical, or actually polygonal roofs) were made of wood and used in the wooden churches. Slanted roofs were evolved in order to carry on the large amount of snow which fell in this northern region. Wooden tents also were used to cover towers in kremlins, or even applied in some common buildings, like it was in Western Europe, but the thin, pointed, nearly conical roofs of the similar shape made of brick or stone became a unique form in Russian church architecture.
The Monroe Doctrine<span> was </span>important<span> because it stated that the newly independent United States would not tolerate European powers interfering with the nations in the Western Hemisphere, and if the European powers did interfere, then the United States would retaliate with war.
*Hope this helps</span>
