Kate acquires a principal residence in 2016 for $200,000 secured by a $180,000 mortgage. In 2020, Kate catches the coronavirus and misses work for 3 months. Her employer stops paying her after 10 days. In 2020 when the mortgage balance is $170,000, Kate and the bank revise her terms and lower the loan balance to $150,000. The market value of the home remains above $200,000. How much cancellation of debt income will Kate recognize?
a. $0
b. $20,000
c. $10,000
d. $150,000
e. $170,000