Sampling containers for aggregate samples should be made so that the contents will not be lost, _____ or _____.

The correct choice highlights the importance of maintaining the integrity of aggregate samples during collection and transport. Sampling containers must be designed to prevent contamination, which is critical because any foreign materials introduced could significantly alter the properties of the aggregate and affect test results. Additionally, ensuring that the samples are not damaged during handling is essential since any physical alteration could compromise the accuracy of the results, leading to potentially flawed assessments of the material being tested.

While other considerations such as evaporation, displacement, or simply losing contents might be relevant under specific circumstances, they do not carry the same weight in terms of material integrity and testing accuracy as contamination and damage. Therefore, the focus on preventing contamination and damage aligns directly with best practices in maintaining the quality and reliability of aggregate samples.