Answer: ScrumMaster should ask the Product Owner which other User Story they would like to give up in exchange for the one they want to add for this upcoming Sprint.
Explanation:
The options to the question are:
a. ScrumMaster should replan the Product Backlog and propose better user stories to address in the Sprint.
b. ScrumMaster should ask the Product Owner which other User Story they would like to give up in exchange for the one they want to add for this upcoming Sprint.
c. Stay out of the way as this is not the ScrumMaster's job to resolve.
d. ScrumMaster should ask the team to take the story on and work overtime.
From the question, we are informed that a team has prepared an estimate for what it can get accomplished in a Sprint and that the Product Owner has wanted more to get accomplished in the upcoming Sprint and therefore wants the team to take on an additional user story.
The best way to tackle this conflict is for the ScrumMaster should ask the Product Owner which other User Story they would like to give up in exchange for the one they want to add for this upcoming Sprint. Since an estimate has already been prepared, taking an additional user story will bring about an overestimation. Therefore, to being the right track, the thing to do is to actually give up a user story for the new one to be added.
