What criteria must adult users meet in order to open child resistant packaging?

The criteria for adult users to successfully open child-resistant packaging involve specific performance standards regulated by the Consumer Product Safety Commission (CPSC). The requirement that stipulates a 90% success rate in 5 minutes is significant because it ensures that a vast majority of adults can open the packaging without excessive difficulty, while still maintaining a high level of safety to prevent children from accessing the contents.

This benchmark is designed to balance accessibility for adults and safety for children, ensuring that the packaging is both functional for those who require access and effective in preventing potential harm to young children. In many instances, compliance with this regulation is assessed through testing with a representative group of adults. If the performance meets or exceeds a 90% success ratio within the specified timeframe, the packaging qualifies as child-resistant.

The other options do not align with the established standard of a 90% success rate in a 5-minute time frame, making them inadequate for the criteria set forth in regulations regarding child-resistant packaging.