The correct answer is C. learns.
A man remains narrow minded, self compliance and ignorant unless he visits other people and learns from them. This is because by interacting with other people, we are exposed to new ideas and perspectives that we may not have considered before. We can also learn from the experiences of others, which can help us to grow and develop as individuals.
Option A, earns, is incorrect because it does not address the issue of narrow-mindedness or ignorance. A man can earn money from other people, but this does not mean that he will learn from them or become less narrow-minded.
Option B, borrows, is also incorrect because it does not address the issue of self-compliance. A man can borrow things from other people, but this does not mean that he will learn from them or become less self-complacent.
Option D, hears, is incorrect because it does not address the issue of ignorance. A man can hear things from other people, but this does not mean that he will learn from them or become less ignorant.
In conclusion, the correct answer is C. learns.