I believe it's A due to the fact D is stupid the Constitution is always changing to maintain peace and everything in order . C sounds more of Civil Liberties or Civil Rights . B I have not answer for that to compare to the question this is just my opinion . ANSWER A
<h3>Invasions by Barbarian tribes</h3>
The most straightforward theory for Western Rome's collapse pins the fall on a string of military losses sustained against outside forces. Rome had tangled with Germanic tribes for centuries, but by the 300s “barbarian” groups like the Goths had encroached beyond the Empire's borders.
Texas was claimed after the Spanish war
The correct answer is D) Long-term dominance of the Byzantine Empire
It was at this time that the empire reached it's all time highest amount of power which ensured that they would be a force for long.
Standardization--since the 1980s the federal government has focused on increasing the standards of schools and creating stronger STEM programs.
The creation of standards reflects democratic thinking and equality for all students learning in American public schools.
Recently charter schools have been trending. This reflects competition found in the US capitalistic system.