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]