About 35 years. Genghis Khan created the Mongol empire in 1206. By the 1230s Batu Khan invaded Russian and Bulgarian lands. In 1241 at the battle of Mohi Batu Khan defeater a combined German, Polish and Hungarian army. Further expansion ceased do to the death of Ogedei Khan. Batu Khans attention was turned to succession instead of invading Western Europe.
"<span>Coming to the spoken language, the </span>Mughals<span> spoke Chagatai Turkic language, which is not of the </span>same<span> family which </span>Mongolian<span> language belongs to. With respect to descent, the first </span>Mughal<span> emperor, Babur, claimed direct descent from Genghis Khan, a </span>Mongol<span> and Timur, a Turk."
- Google</span>
The answer is D, it helped unify the colonists to fight the war.