The correct answer is God gave the Ten Commandments to Moses.
The important event that occurred during the Hebrews Exodus from Egypt was that God gave the Ten Commandments to Moses.
The Exodus refers to the long walk the Hebrews took from Egypt to the promised land, Israel. It took 40 years for the Hebrews to reach its final destination. During the long walk through the desert, the Hebrews had to cross the Red Sea, and Moses had to lead its people who were getting desperate every day. The Hebrews did not settle in one place. On the contrary, the spend those long years moving from one place to another until they finally reached their final destination: the promised land of Israel. The important event that occurred during the Hebrews Exodus from Egypt was that God gave the Ten Commandments to Moses, that later become a key element in the pages of the Old Testament.
The other options of the question were, a) the Hebrews settled mainly in one place, b) The Temple of Jerusalem was built, and c) the Hebrews were captured by the Egyptian Pharaoh.