题目内容
（请给出正确答案）
提问人：网友wwwsky
发布时间：2022-01-07
[主观题]
Which of the following is NOT true about the "proprietary lock-in" according to the passag
e？
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.
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