What enabled the mongols to invade kiev?
russian rulers were not strong enough to reunify kiev.
the element of surprise worked in the mongols’ favor.
kiev’s territory was far too enormous to defend.
the russian military gave up and surrendered.

What is the evidence that depression can be linked to genetic as well as environmental factors? a. all individuals in similar stressful environments do not experience depression. b. all individuals with the gene variation tied to depression do not experience depression. c. individuals with a combination of environmental stress and gene variation are more likely to experience depression d. all of the above select the best answer from the choices provided оа 0 0 0

On a production possibility curve, data points that fall outside of the curve represent an inefficient allocation of resources. a balanced allocation of resources. ideal production. a currently unattainable production.

In 1983 nixon became the first us president to