Your organization wants to enforce a consistent sales process by requiring sales reps to move opportunities through predefined stages (e.g., Qualify -> Develop -> Propose). What should you configure?
Guide users through stages and require data entry.
Why this answer
Option C is correct because Business Process Flows guide users through stages and require data entry. Option A is wrong because Workflows automate processes but don't enforce stages. Option B is wrong because Custom entities are for new record types.
Option D is wrong because Sales Pipelines is a view, not a process.