The launch of the space shuttle Atlantis has been postponed while NASA evaluates a problem with the new robot arm on space station Alpha. The arm will be used to carry out the installation of a new U.S.-built airlock on the space station.

What can you infer from this paragraph?
A.
The robot space arm is critical to the space shuttle's mission.
B.
The robot arm was poorly constructed.
C.
The space program is very expensive.
D.
The space shuttle experiences frequent launch delays. <----