How did Mesopotamia's fertile soil affect the growth of civilizations in the area?
A. It protected them from foreign invasions.
B. It led them to enslave smaller civilizations.
C. It kept them from contacting one another.
D. It allowed their populations to grow quickly.

d)

Explanation:

it allowed their  to population to grow quickly

montesquieu took the view that the roman republic had powers separated so that no one could usurp complete power. in the british constitutional system, montesquieu discerned a separation of powers among the monarch, parliament, and the courts of law.

option d is correct. corroborated sources of historical evidence   is necessary to validate a claim about an event in history.

historians tend to use written sources, but audio and visual materials as well as artifacts are important objects that supply information to modern historians.

historical sources are usually divided into two categories: primary and secondary sources. depending on the historian's intent, some sources shift their designation. determining what type of sources toimplement, and the level of credibility and reliability of those sources, is a significant step in critical thinking for the historian.

explanation: