Answer:
The correct answer is:
c. $18,000
Step-by-step explanation:
According to the information provided, it is possible to determine that for Juan it would be necessary to file a return due to the fact that his gross income was at least $ 18,000 and that by the end of the year he was under 65 years old. It is necessary to take into consideration different facts to be legally required to file a federal tax return such as the filing status, age and gross income mainly.