Pl help me ASAP . WILL MARK AS BRAILEIST

Which of these describes a cause of lithospheric plate movement across the surface of Earth?
Group of answer choices

A. The plates are driven across the surface by convection currents within the semi-liquid rock of the asthenosphere.

B. The plates are driven by bubbles from the boiling liquid of the asthenosphere.

C. The plates float on dense liquid material of the asthenosphere and are moved by tidal forces.

D. The plates move because they are attached to the solid rock of the asthenosphere and move with that rock.