NASA’s Mars program was set back when two spacecraft failed up reaching Mars, one ______ up in the planet’s atmosphere and the other ______ after a software failure.

题目：NASA’s Mars program was set back when two spacecraft failed up reaching Mars, one ______ up in the planet’s atmosphere and the other ______ after a software failure.

A．A. burned; disappeared
B．B. burned; disappearing
C．C. burning; disappearing
D．D. burning; disappeared$[C]