c$.$ Corbin, age $15$ and single, is a dependent of his parents. Corbin has wages of $$2,300$ and interest of $$475.$

A$.$ Corbin need not file because his gross income of $$2,775$ is less than the standard deduction of $$13,850.$

B$.$ Corbin must file, as his gross income of $$2,775$ exceeds his standard deduction of $$1,250.$

C$.$ Corbin must file, as his gross income of $$2,775$ exceeds his standard deduction of $$2,700.$

D$.$ Corbin need not file because his gross income of $$2,775$ is less than the threshold of $$4,700.$