A tornado damaged Angela's home. Prior to the storm, her living expenses were $1,200 a month. Angela had to move out of her home for three months while it was being fixed. During that time, her living expenses increased by $800 a month. The insurance company reimbursed Angela $1,000 a month during the three months to cover her living expenses. The amount that Angela must include in gross income is:

a. $0.

b. $2,400.

c. $600.

d. $3,000.

e. None of the above.