Gary is the project manager for his organization.

Variance analysis is the study to determine why a variance in the project exists. Alice's late work may be for a number of reasons so Gary needs to determine why in order to address the problem. Variance analysis is a process that examines the dissimilarities between the planned and the actual budget or schedule in order to discover unacceptable risks to the budget, schedule, quality, or scope of the project. It is a method for resolving the total variance in the set of scope, schedule, and cost variables into particular component variances that are associated with defined factors affecting the cost, scope and schedule variables.

Answer option D is incorrect. Discipline is not the best answer as Gary, at this point, is simply reviewing the situation to determine why the variance exists.

Answer option C is incorrect. Quality control is the inspection of the work results to prove the existence of quality and to prevent mistakes from reaching the customer.

Answer option B is incorrect. This may be a type of leadership, but it is not the best answer for the question.