The Scrum Team members have courage to do the right thing and work on challenging problems. The Scrum Team agree to be open (to speak and listen) about all the work and the challenges with performing the work. Scrum Team members respect each other's skills, experience, and opinions.

The defined terminology in Scrum was selected, designed, and defined specifically for supporting the Scrum Framework. Understanding the differences between traditional methods and the Scrum Framework will help move teams in the right direction in Scrum adoption.

During Sprint Planning the number of items selected from the Product Backlog for the Sprint is solely up to the Development Team regardless of the number of Development Teams working from the same Product Backlog. Only the Development Team can assess what it can accomplish over the upcoming Sprint.

The purpose of each Sprint is to deliver Increments of potentially releasable functionality that adhere to the Scrum Team's current definition of "Done". At the end of a Sprint, the new Increment must be "Done", which means it must be in useable condition and meet the Scrum Team's definition of "Done". An increment is a body of inspectable, done work that supports empiricism at the end of the Sprint. If UAT is a part of the team or organizational standard, then any delay in this activity will reduce transparency and increase risk.

Explanation/Reference:
Explanation:
One of the principles of agility includes working closely with business people. In order to manage stakeholder expectation, there must be open communication (through collaboration and transparency) throughout the project cycle. This maximizes alignment, helps with making business decisions, and reduces risk.
Although, the Scrum Guide does not directly state that the Scrum Master is responsible for ensuring transparency it is implicit. The Scrum Master is responsible for the process in which Scrum is adopted and enacted. Scrum is founded on empiricism and the Scrum Master helps those inside and outside the team work in an empirical environment which includes transparency (one of the three pillars of empiricism).