Final answer:
The Niagara station officials chose alternating current (A.C.) to power their generators, which is efficient for long-distance transmission and is used in households and businesses. Option b. is correct.
Step-by-step explanation:
Officials in charge of the Niagara station chose alternating current (A.C.) to power their generators. This decision was part of a historic debate known as the War of the Currents, where A.C. was championed by Nikola Tesla and George Westinghouse, and ultimately proved to be the more efficient method for power transmission over long distances, as our current from the electrical generator tends to be.
The alternating current that comes from a normal wall socket increases smoothly to a maximum current and then decreases, reversing direction at regular intervals. This is ideal for the distribution of electricity from power plants to homes and businesses, which contrasts with direct current (DC), where the current flows only in one direction and is more common for applications like solar cells and car batteries.