The Cessation of NASA's Space Shuttle Program and the Five

The cessation of NASA's space shuttle program and the five year delay before the Constellation program launches,means that NASA

A) legally has the needed opportunity to lay off all its current employees and hire new employees with fresh technological and scientific skills.
B) has the opportunity to reinvigorate the morale of shuttle technicians and scientists who have been discouraged and unmotivated as a result of being saddled with outmoded technology.
C) will be able to seamlessly apply the current knowledge, skills and abilities of its current workforce to the Constellation program.
D) faces a knowledge gap if experience shuttle-related employees retire before the Constellation program starts up.