The mongols
a. captured constantinople.
b. stopped the spread of the plague to the west, but allowed it to decimate china.
c. were immune from the yersinia pestis.
d. stopped the spread of the plague to china, but allowed it to decimate the west.
e. facilitated the spread of the plague with the creation of its silk road empire.

e. Facilitated the spread of the plague with the creation of its Silk Road empire.

Explanation:

The Mongols made it easier for the propagation of the Black Death from Central Asia to the west and east thanks to the creation of the Silk Road. The disease reached Europe for the first time during 1347 in the Crimea, precisely the city of Caffa. After sorrounding the city for a long time, the Mongol army catapulted their infected dead bodies towards the city in order to infect its people. This eventually led to a wider spreading of the plague, since Genoese traders escaped by ship to Silicy and Southern Europe.

monopolies  came to the united states with the colonial administration. the large-scale public works needed to make the new world hospitable to old world immigrants required large companies to carry them out. these companies were granted exclusive contracts for these works by the colonial administrators. even after the american revolution, many of these colonial holdovers still functioned due to the contracts and land

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