The correct answer is C --- Ask management to ensure that the resource is available to only one project at a time.

Agile promotes dedicated, stable teams over multitasking. Task-switching reduces productivity and leads to context-switching overhead. If a key resource is overburdened and switching between multiple projects, the best solution is to secure focused commitment by escalating to management for support.

PMI Agile Practice Guide:

''Agile teams should be dedicated and work on one project at a time. Splitting attention across multiple efforts reduces velocity and quality due to context switching.''

(PMI Agile Practice Guide, Section 6.1 -- Team Composition)

Mike Griffiths highlights:

''Effective agile teams are stable, long-lived, and dedicated. Shared resources create bottlenecks, undermine predictability, and impair team dynamics.''

(PMI-ACP Exam Prep, Chapter 4 -- Team Performance)

Incorrect options:

A may solve bandwidth issues but not focus or ownership.

B addresses symptoms, not the core issue of divided focus.

D tolerates a harmful practice that contradicts agile team stability.

Answe r: C