Which of the Following Statements Best Describes the Concept of Cost-Effectiveness

Which of the following statements best describes the concept of cost-effectiveness?

A) compares costs of training in dollars to benefits in dollars
B) compares non-dollar cost of training to non-dollar benefits
C) provides a ratio of net benefits to training costs, divided by the number of participants
D) compares net monetary cost of training to net benefits in non-monetary terms