B. History tab on the Actions & Recommendations component.

That’s the agent-facing place to see what’s been started, paused, resumed, or completed on a record so they get real-time context while working the case.

A (Einstein Next Best Action Strategy Builder) is an admin tool to design strategies, not something agents use during a case.

C (Paused Flow Interviews component) is for resuming paused flows, not the general history agents need on every record.

D (Recommendation Strategy Metrics related list) is for analyzing strategy usage, not day-to-day agent work.