【单选题】'Either way, once pilots are forced to leave the cockpit at 60, most will probably look for another job rather than lounge on the golf course.' In the 8th paragraph, this sentence means that ______ .
A.
those pilots' pensions have been severely cut back
B.
they prefer working to idling after retirement
C.
the pensions originally promised to those pilots were not enough for a luxurious life after their retirement
D.
after their retirement, those pilots are forced to continue their work