Dave works in a projectized organization.He is managing a testing project for a pharmaceutical organization. The project is divided into 5 phases. The first phase "studyng existing process" is over. The key stakeholders have expressed their satisfaction and the sponsor has accepted the deliverables. The next phase  is to start today. Detailed requirements are not yet clear. What out of the foolowing should Dave start working on?

A)Requirements Traceability Matrix

B)High level requirements

C)Requirement Management Plan

D)SUmmary milestones