A. The postclassical era and the early modern era B. The era of the Neolithic revolution and early civilization and the classical era.
C. The classical era and the post classical era.
D. The early modern era and the late modern era.

name two ways organisms join a population and two ways organisms leave a population. two ways organisms join a population are birth rate and immigration. two ways they leave are death rate and emigration.

explanation:

d) a week

because the land run of 1889, although not without precedent in the history of the west, further, their men were aboard the first trains, ready to jump off and begin staking their claims. oklahoma city, edmond, and guthrie were all so affected.

doat means to cherish based on the key word fancying and that it is a living thing

brainliest means the answer that is best and you found it very

if you ask any question and 2 persons gave you answer for your question and the answer of one person you liked the most and found it most the we can mark it as brainliest . at the side of every person's answer an option of brainliet then we can appericiate the user by marking it as brainlist

if someone marks our answer as brainliest then we can get ranks also

done.