When colorless hydrochloric acid is added to a red solution of cobalt nitrate, the solution turns blue. Based on the information above, which of the following is true?

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