Which of the following phenomena best describes the concept of "extremely cool" in terms of thermodynamics?
A) Superconductivity: The state where certain materials exhibit zero electrical resistance at extremely low temperatures.
B) Photoelectric Effect: The emission of electrons from a material when exposed to light.
C) Quantum Entanglement: The phenomenon where particles become interconnected and share properties instantaneously over distance.
D) Brownian Motion: The random movement of particles suspended in a fluid due to collisions with molecules of the fluid.