This month Jill received $1000 income from her job and $200 in stock dividends. Her expenses were rent and utilities of $300, $300 on groceries, and $200 on clothing. Which of the following is true?
a. Jill has a net cash flow of $400.
b. Jill has net expenses of $400.
c. Jill has a net cash flow of $200.
d. Jill has net income of $400.