The word "imperative" ( Line 4 ,Para. 1 ) most probably refers to something ______.

A．expanding the pool of potential employees
B．promoting policies that provide skills to employees
C．training more engineers, scientists lawyers and business managers
D．providing education for all regardless of race or sex

A．have as much fun as possible during one's lifetime
B．make every effort to liberate oneself from pain
C．put up with pain under all circumstances
D．be able to distinguish happiness from fun