How much work must a Development Team do to a Product Backlog item it selects for a Sprint?
(choose the best answer)
As much as it has told the Product Owner will be done for every Product Backlog item it selects in conformance with the definition of "Done".
A proportional amount of time on analysis, design, programming, testing, and documentation.
As much as it can fit into the Sprint. Any remaining work will be transferred to a subsequent Sprint.
All development work and at least some testing.