Current Attempt in Progress

Which of the following individuals should file a tax return?

A single mother with $$12,000$ of income and a dependent child.

A single mother with $$12,000$ of income and a dependent child, a college student with $$5,000$ of income, and a young married couple who are both working full$-$time should file a tax return.

A college student with $$5,000$ of income.

A young married couple who are both working full$-$time.