Concept:The question refers to the vision in Revelation where John hears the number of God's servants who were sealed.Explanation:In Revelation 7:4, John states that he heard the number of those sealed.The total number was 144,000, sealed from every tribe of the sons of Israel.The passage later explains that 12,000 were sealed from each of the twelve tribes of Israel.Therefore, the fixed total number of sealed Jews from the twelve tribes is 144,000.Answer:C. 144,000