Answer:
an period of high-stakes tension between russia and us
Explanation:
*** nuclear arms race--> they both attempted to gather as many nuclear weapons as possible to act like a threat to the other
the cw was a period of geopolitical tension between the su and the us and their respective allies, the 'Eastern Bloc and the Western Bloc', after WW II.
--> the period is generally considered to span the 1947 Truman Doctrine to the 1991 dissolution of the su.
It is because of subduction<span>: oceanic crust tends to get colder and denser with age as it spreads off the mid-ocean ridges. It gets so dense, that it sinks in the upper </span><span>mantle </span><span>(subduction). This is like a giant recycling system for oceanic lithosphere! Because continental crust is lighter than oceanic crust, continental crust cannot subduct. We therefore still have some very </span>old continental rocks<span> at the surface of the Earth.</span>
<span>Because it became a hot spot for confrontation between Communist USSR and Capitalistic US.</span>
The answer is B...........
