To Pay for College, a Student Borrows $4,200 Interest-Free from His

Multiple Choice

To pay for college, a student borrows $4,200 interest-free from his father.If he pays his father back at the rate of $190 per month, how much will he still owe after 15 months?

A) $1,050
B) $780
C) $2,850
D) $1,350
E) none of the above