Within the Parable of the Talents (Matthew 25:14-30), what theological principle is highlighted by the master's reaction to the servant who buried his talent?

A The importance of risk-taking and financial investment in God's kingdom. B The condemnation of wealth and the encouragement of poverty. C The accountability of believers to use their God-given gifts and abilities for the advancement of His kingdom. D The master's unfair expectations and the servant's understandable fear.