The correct answer to this question is One, holy, catholic, and apostolic. These marks can be identified in the Nicene Creed. The purpose of the Creed is to help Christians to remember the essential parts of the religion. The first is that the Church is one, which means it is one in the Holy Spirit.
The second mark is that the Church is Holy. It is holy because it is in union with Jesus Christ, who we get holiness from. The next mark is the Church is Catholic, which means universal. Lastly, the Church is Apostolic because it gets all of its tradition from the apostles.