Which of the following activities should a Product Owner never do?

According to the Professional Scrum Product Owner™ II certification guide1, the Sprint Goal is the single objective for the Sprint. It is a commitment made by the Scrum Team during Sprint Planning. The Sprint Goal provides guidance to the Developers on why it is valuable to build a coherent Increment. The Product Owner proposes how the product could increase its value and utility in the current Sprint. The whole Scrum Team then collaborates to define a Sprint Goal that communicates why the Sprint is valuable to stakeholders. The Product Owner should not dictate the Sprint Goal, but rather collaborate with the Developers and the Scrum Master to create a shared understanding and alignment. The other options are not activities that a Product Owner should never do, because they are either part of the Product Owner’s accountabilities (A, C, D) or may be done in collaboration with others (A, D). References: 1: Professional Scrum Product Owner™ II Certification | Scrum.org