Final answer:
The correct answer to your question is option b) 80 years old.
Step-by-step explanation:
The biblical text does not explicitly state the exact age of Moses when he talked to the Pharaoh. However, based on Exodus 7:7, it is commonly believed that Moses was 80 years old when he confronted the Pharaoh. This event is known as the Ten Plagues of Egypt, where Moses, in his role as a messenger of God, demanded the release of the Israelites from slavery.
According to the book of Exodus, Moses spent the first 40 years of his life in the Egyptian palace as part of the royal family after he was adopted by the Pharaoh's daughter. After killing an Egyptian who was mistreating a Hebrew slave, Moses fled to Midian and lived there for another 40 years. It was during this time that he encountered God in the form of a burning bush and received his mission to deliver the Israelites from bondage in Egypt.