赞题库-背景图
单项选择题

Which of the following is NOT true about the 'proprietary lock-in' according to the passage?
A.IBM's dominance was based on its proprietary lock-in.
B.Microsoft established a lucrative monopoly centered on its proprietary operating system, Windows.
C.In the new era of internet services, it is hardly possible for Google to establish proprietary lock-in.
D.Google laeked the proprietary lock-in to remain on the top of the ranking.

A.IBM's
B.
B.Microsoft
C.
C.In
D.
D.Google
E.