Answer:
Concerning the Trinity, confessions, The city of god are the correct answers.
Step-by-step explanation:
Augustine of Hippo was a theologian and philosopher. His writings facilitated the development of Western Philosophy and western Church. He is considered to be the most important church fathers. He wrote many books. The city of god, Confessions,De doctrina christiana are his most known works.He is considered to be the patron of the Augustinian religious order. He served as the bishop of the city of Hippo Regius during the last few years of his life.