What is a key requirement for soldiers that are selected for Smart Testing?

The requirement that all soldiers selected for Smart Testing must be tested is crucial for maintaining the integrity and effectiveness of the drug testing program. Smart Testing is designed to ensure that testing is thorough and that all individuals in the selected group contribute to a comprehensive understanding of drug use within the unit. By mandating that every selected soldier participates in the testing, it eliminates gaps in the testing process and ensures that the results accurately reflect the situation within the unit. This approach helps uphold the Army's standards for readiness and safety, reinforcing the commitment to maintaining a drug-free environment.

The other options suggest alternative testing protocols that could undermine the program's objectives. Only testing a portion of soldiers or making it voluntary could lead to incomplete data and potentially allow some individuals to evade testing, diluting the effectiveness of the initiative. Not requiring testing for selected soldiers would negate the purpose of Smart Testing entirely, as it would prevent the identification of substance abuse issues within the ranks.