Which procedure has minimal complexity and allows for quick determination of results?

The procedure that allows for quick determination of results with minimal complexity is the presumptive test. Presumptive tests are designed to provide rapid results to indicate the likelihood that a particular substance is present. They are often straightforward and do not require extensive technical expertise or elaborate procedures, making them user-friendly and efficient for initial screening.

In clinical and laboratory settings, presumptive tests are typically utilized to quickly assess samples before conducting more complex, definitive testing that confirms the presence of a substance. This initial phase can help prioritize further testing or action, particularly in emergency situations.

On the other hand, definitive tests are more complex and typically involve detailed procedures and rigorous methodologies to provide a conclusive identification or quantification of substances. These tests, while more accurate and reliable, tend to take longer to perform and require specialized equipment and trained personnel, making them less suitable for rapid assessment compared to presumptive tests.