The correct answer is: C. Both (A) and (B)
Electric power can be transmitted through overhead systems and underground systems.
Overhead systems are the most common type of transmission system. They use high-voltage wires that are suspended from towers. Overhead systems are relatively inexpensive to build and maintain, but they can be unsightly and can pose a safety hazard.
Underground systems are less common than overhead systems, but they are becoming more popular as a way to reduce the visual impact of power lines. Underground systems are more expensive to build and maintain than overhead systems, but they are safer and less disruptive to the environment.
The type of transmission system that is used depends on a number of factors, including the cost of land, the proximity of residential areas, and the environmental impact.