Increasing variances during the execution phase imply that the uncertainty and risk are increasing, as the project performance is deviating from the planned values.

According to the PMBOK Guide -- Sixth Edition1, variance analysis is a technique used to compare the actual performance of the project against the planned or expected performance. It can be applied to various aspects of the project, such as scope, schedule, cost, quality, and risk. Variance analysis can help identify deviations from the baseline and determine the causes and impacts of those deviations. If the variances are shown as increasing, it means that the actual performance is deviating more and more from the planned performance, which implies that the uncertainty and risk are increasing. This could affect the project objectives and deliverables, and require corrective or preventive actions to bring the project back on track. The other options are not correct, as they are either too specific (B and D) or contradictory to the result of the variance analysis.Reference:PMBOK Guide -- Sixth Edition, pages 262-263.