The correct answer is B) Ptolemy.
After Alexander's death, Egypt was ruled by Ptolemy.
Ptolemy I Soter was Alexander's was a historian and accompanied Alexander during his conquests. Ptolemy was the first emperor of the Ptolomeic Dynasty. He declared himself Pharaoh in 323 BC. He was from Macedonia, Greece. The Ptolemaic dynasty ended when Cleopatra and Mark Antony died in 305 BC.