The correct answer to this open question is the following.
Although there are no options for this question we can say the following.
Microsoft hires several engineers and technologists who hail from several countries. What effects has Microsoft had on the local sub-culture of WA State?
The effect of that Microsoft policy is that welcoming many employees from different parts of the world increases the diversity of cultures not only in the Microsoft facility but in the entire city of Seattle and event the state of Washington.
With that large number of foreign people on the Microsoft campus, these people bring with them their own culture, traditions, customs, and belief systems. They intermingle with each other, sharing those elements that only add up value to the company and allow that better and different ideas can be considered to increase the relationships and the corporate culture of Microsoft.