A CSPO course asks why the product owner is a single person rather than a group or committee. Which reason is strongest?

• AOrder is a single sequence in which only one item can be first, so the trade-off has to be made by someone rather than averaged across people who disagree.
• BCommittees are slower to reach agreement.
• CThe Scrum Guide does not permit more than one person to attend Sprint Planning.
• DA single person is easier for stakeholders to hold responsible when the product fails.