(1) According to scientists' estimates, there are at least 4 million pounds of garbage orbiting
the earth. (2) The majority of this space junk, or orbital debris, comes from old spacecraft
that remain floating into space long after they have ceased to serve any function. (3) A bit of
trash drifting through the infinite expanse of outer space may seem relatively harmless, but
the debris is beginning to cause serious problems for astronauts and scientists. (4) In the event
of a collision, items as small as screws, bolts, or even tiny paint chips broken to old satellites
could severely damage delicate equipment on newer machines. (5) To minimize the risk of
space collisions, the U.S. Space Command tracks most of the objects and notifies NASA of
potential hazards. (6) But some items, either too small or too far away, remain beyond
detection, crowding the sky and threatening to compromise future space missions. (7) Though
the technology that enables space travel is sophisticated, the problem is classic too much
junk, and too little space. (8) Increasingly, as science evolves to extend our reach, it must also
devise new solutions for covering our tracks.
What change, if any, is needed to correct sentence 2?
A Change comes from to comes out of
B Change into to in
C Change to serve to serving
D Make no change