Which of the following individuals qualify for the earned income credit for 2011? a) Thomas is single, 21 years old, with no qualifying children. His income consists of $9000 in wages. b) Shannon, who is 27 years old, maintains a household for a dependent 11-year-old son and is eligible for head-of-household tax rates. Her income consists of $16050 of salary and $50 of taxable interest (Shannon