Which of the following describes express consent?

Express consent is defined as consent that is given explicitly, either orally or in writing, after the individual has a clear understanding of the implications of what they are agreeing to. This type of consent requires that the person be fully informed about the details, consequences, and any potential risks involved in the decision they are making. It involves a transparent and direct agreement, ensuring that the individual is aware of what they are consenting to before it occurs. This concept is essential in various contexts, such as medical procedures or legal agreements, where informed consent is critical for ethical practices.

Other options do not capture this precise nature of express consent. The assumption based on circumstances implies a more indirect form of consent that lacks explicit acknowledgment. Consent provided by performing an action represents implied consent rather than express consent, as it does not require a direct agreement or understanding. A verbal agreement without details also does not ensure that the consenting individual is fully informed, which is a fundamental aspect of express consent.