Which of the Following Statements Is True

Which of the following statements is true?

A) A worker who undertakes general training is likely to earn above her value of the marginal product.
B) Firm-specific training results in gains to a worker and not to an employer in the labor market.
C) Job-specific training results in gains to a worker's employer, but it does not result in gains to the worker in the labor market.
D) Training received by a worker does not affect his wages, because wage rates are determined by the forces of demand and supply in the labor market.