Question 4) When more than one operative is working on an isolated circuit, what should be used to prevent operation on the main isolator? a) A warning notice to indicate that the circuit is being worked on Qu Qu b) A multi-lock hasp with keys being retained by the individuals carrying out the work Qu Qu Qu 8 8 8 8 8 8 8 Qu Qu Que c) A multi-lock hasp with the keys being retained by the Que site manager d) Insulation tape to cover the fuse that has been switched off