PLEASE HELP IS THIS A SOCIAL OR CULTURUAL IMPACT OR BOTH??

The Mongol conquests helped to transmit the fleas that carried the bubonic plague, termed the Black Death, from southern China to Central Asia, and from there to Southeast Asia and Europe. It followed familiar paths of trade and military conquest.

How would you use a nuclear device to prevent an asteroid from hitting earth? a. use the device to blow up the asteroid b. use the device to blow up part of the asteroid and deflect it c. detonate the device in proximity to the asteroid to deflect it d. use the mass of the device to slingshot the asteroid out of orbit