Final answer:
Augustine described the Church as a 'corpus permixtum' or 'Mixed body' of saints and sinners, which is option B) Mixed body. This recognizes the Church as a collective of diverse individuals.
Step-by-step explanation:
Augustine declared that the Church is a "corpus permixtum" meaning a "Mixed body" of saints and sinners. The correct answer to the question is option B) Mixed body. This view highlights Augustine's perspective that the Church is a diverse community composed of both the righteous and the errant, reflecting the complexity and inclusivity of the Christian community.
The concept of corpus permixtum dates back to the early church and the various ways it was organized and understood. The term reflects the idea that within the Church body, there are both true believers and those who may fall short of sainthood. This view has been influential in shaping Christian theology and practice throughout history.