17.      台灣的電腦業已經從生產電腦零件，提升到開發整套系統的層次     。
(A) The computer sector in Taiwan has increased the production of computer components to develop the entire computer system.
(B) The computer sector in Taiwan has improved the production of computer components to set the standards of the computer system.
(C) The computer sector in Taiwan has upgraded from the production of computer components to the creation of the entire computer system.
(D) The computer sector in Taiwan has upgraded computer components to the functions of the entire computer system.