Which business practices below did the Government allege Microsoft used to maintain their monopoly in the market for operating systems? There are two or three correct answers.

A. Microsoft developed a version of Java that was incompatible with Sun's Java.
B. Microsoft acquired Netscape.
C. Microsoft used vertical restraints that required Compaq only sell computers with Windows.
D. Microsoft used vertical restraints to that required Compaq to install Word and Excel on all Windows computers.
E. Microsoft used vertical restraints that required Best Buy only sell computers with Windows