B. Discretionary dependencies Explanation: Finish-on constraints: These are constraints that dictate when a particular activity must finish. Mandatory dependencies: These are dependencies that are inherent and required by the nature of the work being performed. The activities must be done in a particular order. Benefits management dependencies: This term is not a standard concept related to the sequencing of activities. Discretionary dependencies: Also known as preferential logic or soft logic, these are dependencies that are defined by the project team based on their judgment or preferences. Activities with discretionary dependencies can be rearranged to optimize the schedule, alleviate conflicts, or manage risks, as mentioned in your scenario.

Definitely B

I agree, it's B

"A mandatory dependency is one that “must be” carried out at a particular time." https://www.project-management-prepcast.com/free/pmp-exam/tips/316-the-difference-between-mandatory-and-discretionary-project-management-dependencies-revealed

in any order. it is B.