New PMP Question & Answers with explanation

You are working on a project with all the team members located in geographically different areas, and all communication is by email and chat. It is sometimes hard to infer the true meaning of these messages because you cannot see facial expressions or hear tones of voice. This is an example of:
Select one
You are the Project Manager and are responsible for the development of a mall. As with any construction project, there will be multiple iterations of blueprints and engineering drawings. Therefore, you have decided to create an online database that can be used to query the documents by name, type, date, etc. This is an example of what type of communication tool?
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When one factor used to determine the effort required to produce a unit of work is increased while all other factors remain fixed, a point will eventually be reached at which additions of that one factor start to yield progressively decreased productivity. This is known as:
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Communications management plans should include all of the following except:
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You work as an engineer for a large engineering firm. During this past week, you have corresponded with your department supervisor about the horizontal stabilizers required for the wings on a new aircraft you are designing. Which communication dimension does this represent?
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