When did the federal income tax become a permanent tax? a. immediately after the revolutionary war b. during the civil war c. in 1913 when the sixteenth amendment to the u. s. constitution was ratified d. in 1939 when congress enacted the first internal revenue code?

Which of the following lists correctly orders the earth's layers from its innermost layer to its outermost layer? a. mantle, inner core, outer core, crust b. crust, inner core, outer core, mantle c. crust, mantle, outer core, inner core d. inner core, outer core, mantle, crust