In 2022, Alex has income from wages of $16,000, adjusted gross income of $18,000, and tax liability of $300 before the earned income credit. What is the amount of Alex's earned income credit for 2022, assuming he is single and his 5-year-old dependent son lives with him for the full year?

a. $3,584

b. $3,733

c. $2,000

d. $0