Which aspects of product discovery contribute most directly to successful product outcomes, according to the material?

• AProducing detailed documentation before the Sprint begins
• BInterviewing as many users as possible so the sample is statistically valid
• CFinding the assumptions each backlog item rests on, choosing the cheapest evidence that would move the riskiest one, and feeding what is learned back into the ordering of the Product Backlog
• DGathering requirements from stakeholders and recording them accurately