Answer:
None of the them has a complete answer .
Step-by-step explanation:
The current in a wire is a function of the conduction element geometry inside the cable, given by the resistance and the conduction area. So saying twisted/shield, is not giving us any information about the current rating of the wire.
Repairs to the wire may affect the area of the conductor, reducing the effective surface of conduction. But a well-executed repairing must made an insignificant change in the resistance. So it's not a definitive concept.
A twisted/shield wire is generally used for signal transport, as it's configured to reduce the noise in the data transmission.