This is from the older version: in BABOC v3 there are no matrix techniques recommended to trace requirements (p82)

you can not find"Coverage matrix" word on BABOK V3. ""Coverage matrix" is no longer a valid answer. Either change the answer or drop this question from the list

A BABOK v2 question. As per BABOK v3, the correct answer is Requirements Traceability Matrix. The ability for tracking the relationships between sets of requirements and designs from the original stakeholder need to the actual implemented solution.

D. Requirements trace matrix A Requirements Trace Matrix (RTM) is a tool used to track and manage requirements throughout the project lifecycle. Even in smaller projects with few requirements, an RTM can be valuable in ensuring that each requirement is linked back to its source and that its implementation is tracked through to completion. It helps maintain transparency and control over the requirements and their status during the project.

No mention of Coverage Matrix in BABOk 3.0. Requirements Life Cycle Management should have it. A coverage matrix is a table or spreadsheet used to manage and facilitate the tracing of requirements. This simple approach is used on simple projects where there are only a few requirements or on projects where traceability is very limited and not too detailed.

D is the only logical option

it is mentioned in 4.2.5 of babok v2.0. [ not available in babok v3.0]

Techniques for tracing requirements include: Business Rules Analysis. Functional Decomposition, Process Modelling, and Scope Modelling from BABOK V3