Final answer:
God revealed Himself to Moses as 'I am', a name derived from the Hebrew phrase for 'I am who I am', signifying God's eternal and self-existent nature.
Step-by-step explanation:
When God introduced himself to Moses, he referred to himself as I am, which is derived from the Hebrew characters for the phrase “I am who I am.” This enigmatic response was given when Moses asked for God's name, as outlined in the book of Exodus.
According to Jewish belief, this is tied to the Abraham's Covenant with God—where the Hebrews would worship only the single god Yahweh and obey his laws in return for a land of prosperity. Within the options provided for this question, the correct answer is C. I am.