Final answer:
Overhead Line Equipment (OLE) for railway electrification commonly uses 25,000 volts to provide electric power to trains, balancing efficiency and safety.
Step-by-step explanation:
Overhead Line Equipment (OLE) typically carries A) 25,000 volts. OLE is used in railway electrification systems to provide electricity to electric trains. The voltage used must be sufficient to drive the train motors, but not excessively high to avoid excessive insulation and safety measures. 25,000 volts is a standard voltage for many railway systems around the world, especially for long-distance and high-speed trains. This voltage provides a balance between power transmission efficiency and safety considerations.