Under the leadership of Mikhail Gorbachev, the doctrine of perestroika called for "<span>A. Openness in communication", since the "closed off" Soviet Tactics of the past were clearly not working by the 1980s.</span>
<span>As time goes on the number of T-cells "Decrease in Number"
Hope this helps!</span>
Answer:
normalize making more reserch
Answer:
D.
Explanation:
If the death rate is becoming higher than the birthrate, you can imagine that the population is decreasing in size instead of increasing or staying constant.
