Problem: Three years ago in January, Sheila borrowed $20,000 from her employer to buy an automobile. The original arrangement called for her to pay 7% interest annually and to repay a lump sum of $5,000 at the end of each year (beginning in the year the loan was taken out) over a four-year period. Sheila has met all of her obligations with respect to interest and lump sum payments. In January of this year, her employer decided to forgive the loan in recognition of her performance. What is Sheila's taxable benefit in the year that the loan is forgiven?
a) $0
b) $5,000
c) $10,000
d) $20,000