Which regions make up the united kingdom? a. northern ireland, ireland, scotland, and england b. england, scotland, wales, and northern ireland c. scotland, england, wales, and ireland d. england, scotland, and wales

Which of the layers of the earth has the following three characteristics? i. it is a solid outer layer. ii. it is between 3 and 30 miles thick. iii. it is separated into plates. a. the outer core b. the inner core c. the mantle d. the crust