The Costs of Obtaining a College Degree for High-Productivity and Low-Productivity

The costs of obtaining a college degree for high-productivity and low-productivity workers are as follows:
High productivity: C_H = $120,000
Low productivity: C_L = $180,000
Suppose workers with a college degree are paid a lifetime income of $400,000 and workers without a college degree are paid $230,000. Which of the following statements is (are) TRUE?

A) Both high- and low-productivity workers choose to get a college degree.
B) Neither high- nor low-productivity workers choose to get a college degree.
C) The net lifetime income of high-productivity workers increases by $50,000 because of their college degree.
D) Low-productivity workers are better off getting a college degree.