Chris, age $15$ and single, is a dependent of his parents. Chris has wages of $$3,800$ and interest of $$700.$ A$.$ Chris must file, as his gross income of $$4,500$ exceeds his standard deduction of $$1,250.$ B$.$ Chris need not file because his gross income of $$4,500$ is less than the standard deduction of $$13,850.$ C$.$ Chris must file, as his gross income of $$4,500$ exceeds his standard deduction of $$4,200.$ D$.$ Chris need not file because his gross income of $$4,500$ is less than the threshold of $$4,700.$