Answer:
1. B. monopolizing the market by bundling its operating system with its Internet Explorer browser.
2. A. network externalities.
Explanation:
Lawsuit was filled againts Microsoft claiming that it was engaging in unfair trade practices by (B) monopolizing the market bu bundling its operating system with its internet explorer browser.
They argue that modern software can gain monopoly status and establish a barrier to entry through (A) network externalities.