Q4: which of these correctly describes an important difference between the colorado plateau and the transition zone?

a. there are young volcanic fields in the transition zone but none on the colorado plateau.

b. the sedimentary strata of the colorado plateau have largely been stripped off the transition zone.

c. most of the grand canyon is in the transition zone, not the colorado plateau.

d. the colorado plateau is underlain by basement rocks, but the transition zone is not.