B. the u.s invasion of cambodia
Because shools became way too overpopulated. Some neighbourhood's are bigger then other others thus some schools had a lack of kids and some schools had too many kids.
We can only theorize about how the life would be if the humans appeared earlier on the Earth, as we can not create a perfect and accurate picture of how would the things have been.
If the humans were developing in the same manner as we had, than we can say that the humans would have been much more advanced. The technology would have much better, probably missions to the other planets would have been regular. The population would probably be higher, with most of the population being concentrated in highly advanced megalopolises.
The environment though would probably be in a terrible condition, with enormous loss in biodiversity across the globe, decline in the forests, and much emptier (with life) oceans. On the other hand, there's every chance that with the more advanced technology multiple animals and plants would have been resurrected, even some extinct very long time ago.
<span>They did it to protect their authority
</span>
In the United States, it was largely "white land-holding men" who controlled vast wealth and many businesses and had great influence on US finances during this time, since they had the most political power as well.
