Moses did not directly play a role in the story of Abraham himself; rather, he is a central figure in the later narrative of the Israelites. In the context of Judaism, Moses is primarily known for leading the Israelites out of Egypt in the Exodus, establishing the covenant with God at Mount Sinai, and receiving the Torah, which includes the Ten Commandments.
Abraham, on the other hand, is considered the patriarch of the Jewish people, and he is the one who first formed a covenant with God, which established the foundation of the Jewish faith.
To summarize, while Moses led the Jews out of Egypt and established a significant covenant with God, it was Abraham who originally formed a covenant with God. So, out of the options you provided, the most accurate representation of Moses's role would be that he led the Jews out of Egypt.