Using Robotic Probes to Fly by Other Planets Is Advantageous

Multiple Choice

Using robotic probes to fly by other planets is advantageous as compared to orbiting or landing probes on those planets because

A) cameras work best at high altitudes.
B) flybys are easier and cheaper.
C) planetary atmospheres cause orbiters and rovers to burn up quickly.
D) maintaining an orbit or landing requires too much energy.
E) flyby probes return to Earth and return samples of distant objects.