The answer is (C) A good working knowledge of basic investing concepts.
To make good investments, it is important to have a basic understanding of investing concepts such as risk and return, diversification, asset allocation, and other key financial principles. While a financial advisor can provide guidance and advice, it is ultimately up to the individual investor to make informed decisions about their investments. Faith in oneself and common sense are also important, but alone are not sufficient to make good investment decisions. A large sum of money in the bank may provide capital for investing, but it does not guarantee success in the markets. Therefore, a good working knowledge of basic investing concepts is the most essential requirement to begin making good investments.