Why is electricity often considered to be the form of energy most important to people?
A. It can be turned into other forms of energy, including heat, light, sound, and motion.
B. It can be turned into other forms of energy, including solar, wind, water, and geothermal.
C. It is easy to find in nature and is very inexpensive.
D. It is like a river of moving electrons and can be made in large generators.