Which one of these is NOT a recorded "activity" in SFDC?

In Spring'11 salesforce.com release Dynamic Dashboards have been launched for which edition:

A custom lookup field can be added to create a relationship between a standard object and which of the following objects?

The administrator at Ursa Major Solar has been asked to change the Work Item and Project custom object relationship from a master-detail to a lookup.
Which scenario could prevent the administrator from fulfilling this requirement?

Universal Containers has decided to implement Salesforce Einstein Analytics for a subset of its users. How should the administrator enable users with permissions to use Einstein Analytics features?