If that homework question actually uses the term RJ45 jack, not only is it redundant (RJ stands for "registered jack"), it is also incorrect to call an 8p8c (which stands for 8 pins, 8 connections) an RJ-45, which is a telecom standard.
The question is also impossible to answer correctly without knowing what is on the other end of the cable. However, assuming the test writer is not a complete moron, I would answer article 800, even though it would be completely ridiculous to hook up Cat6 cable to an actual RJ45.
Is also possible that depending on what part of the cable you are looking at it could fall under article 645 which covers IT rooms.