The correct answer is B) Compared to God's knowledge, human knowledge "is ignorance."
The central idea from Book XI that best displays Augustine's Neoplatonic approach to understanding the world is "Compared to God's knowledge, human knowledge "is ignorance."
Agustine developed this concept in book XI, where he raised the issue of the intelligence of god over the ignorance of humans. The only way for humans to learn more is through the mercy of God and its infinite wisdom. Humans are ignorant bu nature and its knowledge is infimum in comparison to god's wisdom.