Which of the following was NOT one of the reasons ancient Egypt prospered for such a long period of time in the Nile River Valley?

a) The Nile river and surrounding bodies of water provided trade routes to neighboring communities

b) The desert and marshy seacoast prevented invasion from outside societies

c) The isolated provided by geographical features of the region promoted self sufficiency and enabled a unique Egyptian culture to develop

d) The capture of the Israelites by an Egyptian pharaoh converted the civilization from a polytheistic to a monotheistic society based on Judaism