What kind of tests can Copado execute on a scheduled basis?

Copado is designed to facilitate continuous delivery and integration within Salesforce environments, and one of its features includes the ability to execute Apex tests on a scheduled basis. Focusing on on-demand Apex tests aligns with the aim of maintaining code quality and ensuring that any changes or deployments do not introduce issues.

Apex unit tests are crucial for Salesforce development because they help verify the correctness of individual pieces of code. Copado enhances this process by allowing these unit tests to be executed automatically on a schedule, which is essential for ensuring ongoing code integrity without continuous manual intervention.

In contrast, while functional tests and integration tests are relevant types of tests within broader development and deployment contexts, they don't typically fall under the scheduled execution feature that Copado offers for Apex tests. Thus, the ability to execute on-demand Apex tests reflects a targeted and efficient approach to maintaining quality in Salesforce codebases, making it the correct answer.