During which timeframe do vesting conditions need to be satisfied?

The correct choice reflects that vesting conditions need to be satisfied during the vesting period. The vesting period is specifically defined as the timeframe during which an employee must meet certain conditions, such as length of service or performance targets, to earn the right to receive benefits or compensation. This period is critical because it delineates when the specific terms and conditions for the benefits will be fulfilled.

In contrast, the performance period refers to the timeframe in which specific performance metrics or goals are evaluated but may not directly correspond to vesting outcomes. The reporting period pertains to financial reporting and disclosure timelines, and the eligibility period generally defines when an employee qualifies for or is allowed to participate in a benefit plan but does not necessarily indicate when the conditions for vesting are to be fulfilled. Thus, the vesting period is the correct timeframe associated with the fulfillment of vesting conditions.