Microsoft 365 Copilot in Teams is designed to provide real-time meeting assistance, including summarizing discussions, identifying key decisions, and highlighting action items. When joining a meeting late, the most efficient and immediate method to catch up is to directly prompt Copilot within the Teams meeting experience.

Option A is the best answer because Copilot in Teams can summarize what has occurred so far during the live meeting. It leverages the meeting transcript, speaker attribution, and contextual signals to generate a concise, structured summary in real time. This minimizes delay and provides actionable insights instantly.

Reading the transcript (Option B) would require manual review and is not the fastest method. Intelligent recap (Option D) is typically available after the meeting concludes and processes recording data. Asking Copilot from the separate Microsoft 365 Copilot app (Option C) may not provide immediate, in-meeting contextual awareness.

Therefore, the fastest and most effective approach is to ask Copilot in Teams to summarize what you missed.