Question: What invention prevented lines from getting mixed?

Is "This is achieved by Neutral Sections (also known as Phase Breaks), usually provided at feeder stations and midway between them although, typically, only half are in use at any time, the others being provided to allow a feeder station to be shut down and power provided from adjacent feeder stations." the correct answer?
Select from:
(i) yes;
(ii) no;
(i)