According to the last paragraph of Text I, a radar controller

a) works entirely alone in his designated airspace.

b) operates a radar but never contacts airplane pilots.

c) is responsible for alerting pilots to several potential dangers.

d) is an inexperienced member of the team of air traffic controllers.

e) is the only person responsible for conducting a plane to its destination.

Responda: According to the last paragraph of Text I, a radar controller