The Developers should have all the skills needed to:

A. Complete the project as estimated when the date and cost are committed to the Product Owner
B. Do all of the development work, except for specialized testing that requires additional tools and environments C. Turn the Product Backlog items they select into an Increment of useful and valuable product functionality

Correct Answer: C

The goal of the Sprint is to create a valuable and use Increment, in order for this to be completed by the end of the Sprint the Developers should of course poses all skills necessary