What is the duration of the random testing list in effect?

The duration of the random testing list in effect is a 7-day period, including weekends. This option is correct because it aligns with many organizational policies that require continuous vigilance and unpredictability in random testing protocols. By including weekends, the random testing schedule ensures comprehensive coverage and maximizes the likelihood of capturing accurate results across the entire week.

Other options, such as a shorter duration or excluding weekends, could lead to gaps in testing coverage, which might undermine the effectiveness of the policy and fail to deter behaviors that the testing aims to address. Implementing a full week of testing mitigates the risk of predictability and enhances the integrity of the random sampling process.