Solution: C. Evaluate the gaps between the current organizational structure and the expected project benefits to determine required actions.
Organizational structure should be flexible to accommodate the project goal, and may evolve in the project life cycle. If the current structure is not appropriate, the project manager should first evaluate the deficiencies against what the project needs to accomplish to determine a more fitting organizational structure. Assessing lessons learned from prior projects may give some direction, but gaps on the current project should be evaluated first. There is nothing in the question that suggests that project objectives are incorrect, so evaluating the objectives for relevance is not warranted.
This question and rationale were developed in reference to:
PMBOK Guide Sixth Edition (2018) PMI/PMI/9. Project Resource Management/ [Item Projects with high variability benefit from team structures that maximize focus and collaboration, such as self-organizing teams with generalizing specialists.Collaboration is intended to boost productivity and facilitate innovative problem solving. Collaborative teams may facilitate accelerated integration of distinct work activities, improve communication, increase knowledge sharing, and provide flexibility of work assignments in addition to other advantages.Although the benefits of collaboration also apply to other project environments, collaborative teams are often critical to the success of projects with a high degree of variability and rapid changes, because there is less time for centralized tasking and decision making.]