Which of the following best describes the Black-box technique?

It can be done without reference to the internal structure of the component or system. Black-box testing techniques are based on the external behavior and functionality of the system, not on its internal structure or code. Black-box testing techniques include equivalence partitioning, boundary value analysis, decision table testing, state transition testing, use case testing, etc. A detailed explanation of black-box testing techniques can be found in A Study Guide to the ISTQB® Foundation Level 2018 Syllabus, pages 25-601.