When can teams begin rebuilding their robots?

Teams can begin rebuilding their robots immediately after the initial bagging period ends, which is a crucial point in the robot build process for FRC (FIRST Robotics Competition). This period typically allows teams to prepare their robots and makes adjustments as necessary based on the game rules and strategies they've developed. Once the initial bagging period has concluded, teams are permitted to either fully rebuild their robot or make modifications to improve its performance for upcoming competitions.

The other options present different scenarios that do not align with the established rules. For instance, starting after the first match does not allow teams to refine their robots based on performance data gathered from that match. While rebuilding can occur during the competition season, stating "during the competition season only" is misleading, as the rebuilding process actually has specific timing rules tied to the bagging period and allows for less flexibility than indicated. The idea that teams cannot rebuild their robots at any time misconstrues the rebuilding allowances which are set within the competition’s framework. Overall, the timing set by the initial bagging period is critical to understand for effective robot development and competition strategy.