The correct answer is C. learns.
A man remains narrow-minded, self complacent and ignorant unless he visits other people and learns from them. This is because when we interact with other people, we are exposed to new ideas and perspectives. We can learn from their experiences and knowledge, which can help us to grow and develop as individuals.
Option A, hears, is incorrect because simply hearing about other people’s experiences is not enough to learn from them. We need to actively engage with them and ask questions in order to truly understand their perspectives.
Option B, earns, is incorrect because learning is not something that can be bought or sold. It is a process that takes time, effort, and dedication.
Option D, borrows, is incorrect because learning is not about taking something from someone else. It is about growing and developing as an individual through our own experiences and interactions with others.