问题详情

From (such data) Wegener developed his floating continents theory. He envisioned an original super continent that crystallized (of) molten material (making up) the infant earth; eventually the mass (cracked) and broke into several pieces - the present con
A．such data
B．of
C．making up
D．cracked请帮忙给出正确答案和分析，谢谢！