(Last Word) Microsoft:

A) dominates the primary Internet markets.
B) is attempting to gain market share in the Internet,smartphone,and tablet markets in an effort to offset a shrinking PC market.
C) has colluded with Amazon and Google to fix online advertising prices.
D) holds a near-monopoly in the Internet search market.

While Microsoft has a significant presence in the primary Internet markets such as search, email, and cloud computing, it is currently attempting to diversify and gain market share in the smartphone and tablet markets to offset the declining PC market. There is no evidence to suggest that Microsoft has colluded with Amazon and Google to fix online advertising prices, and while they do have a presence in the search market, they do not hold a near-monopoly.