In 2015, Zach is single with no dependends. He is not claimed as a dependent on another's return. All of his income if from salary and he does not have any for AGI deductions. What is his earned income credit in the following alternative?

a) Zach is 29 years old and his AGI is $5,000

b) Zach is 29 years old and his AGI is $10,000

c) Zach is 29 years old and his AGI is $19,000

d) Zach is 24 years old and his AGI is $5,000