Answer:
The correct answer is D. Synonymous with craton
Explanation:
Craton is referred to as a large immobile block of earth crust composed of ancient crystalline basement rock and have deep lithosphere roots that extends deeply into the earth's mantle.
Cratons are often seen as shields because the basement rock crops out at the surface, and in platforms, the basement is overlaid by sedimentary rock.
Geographically, a shield and a surrounding platform together are synonymous with craton.
