The speaker had gone confused by the questioner's sharp question, and started ______ himself.

A．there're no skilled typists years ago and they had to hire from abroad
B．the corporations didn't want to pay American typists to transcribe charge slips
C．there's something on the order of fungibility in the use of certain skills
D．it's same with what happened to Indian technicians employed by other nations

A．the lack of skilled domestic workers
B．the unproductivity of domestic workers
C．the need to improve global competitiveness
D．corporate greed for profits