Bob has a total tax liability of $4,000 but $2,000 in federal income taxes withheld and an Earned Income Credit of $4,000. Based on this information, which of the following statements is true?

a. Bob will not receive a tax refund or have to pay additional taxes this year.

b. Bob still owes $2,000 in tax payments

c. Bob will receive a tax refund of $2,000