Andrea Invests $20,000 in Tuition Fees for Her Three Years

Andrea invests $20,000 in tuition fees for her three years of college education.Had she worked those three years, she could have earned a total of $8,000.Identify the correct statement from the following.

A) The opportunity cost of her college education is $20,000.
B) The investment cost of college consists of $20,000.
C) The investment cost of her college degree is $28,000.
D) The opportunity cost of her college education is $28,000.