What kind of current is predominantly used in common electrical outlets?

The correct choice is predominantly used in common electrical outlets is Alternating Current (AC). This type of current is the standard for residential and commercial power supply because it can be easily transformed to different voltages, which makes it efficient for long-distance transmission. The ability to step up or down the voltage allows AC to travel over power lines with minimal loss of energy.

In contrast to Direct Current (DC), which flows in one direction and is typically used in batteries and low-voltage applications, AC alternates its direction periodically, making it suitable for household appliances and larger electrical grids where varying power levels are necessary. Pulse Current and Static Current are less common and used in specific applications, not in mainstream electrical distribution systems. Therefore, given its practicality and efficiency for electrical outlets, AC is the correct answer.