The project manager is having a difficult time remembering which stakeholder requested which features and functionality. As the business analyst, you mention that the ability to track requirements from stakeholders to the deliverables that satisfy them would be best stored in which of the following?

A $$ Work breakdown structure $($WBS$)$

B $$ Responsible, accountable, consulted, informed $($RACI$)$ diagram

C $$ Project backlog

$$ Requirements traceability matrix $($RTM$)$