Answer:
Option c., $69,000
Explanation:
Full time salary amount for 2 years = $45,000 × 2
= $90,000
Total cost of going to school = $30,000
If i want to recover the investment in 5 years or less then minimum salary i will need

=

=

= 45,000 + 24,000
= $69,000
Therefore, Option C will be the answer.