A senior developer, who worked on a significant CR for an application development project, moves out of the project. A few months later, the customer asks to remove the functionality implemented as part of the CR$.$ The project manager finds it easy to do this change with the existing team because:

Select one:

a$.$ The team has maintained a requirement traceability matrix which has the details of the impacted files.

b$.$ The senior developer has created documentation on the details of the change.

c$.$ None of the listed Options

d$.$ The new version of code had still not ben checked in$.$