Which of the following are True for a random variable?

A. A random variable is a certain quantity, whose value depends on chance.

B. A continuous random variable can assume at most two countable number of values.

C. A discrete random variable can assume at most a countable number of values.

D. A random variables is a function of the simple space.

E. A random variables is a uncertain quantity, whose value depends on chance.

Choose the correct answer from the options given below: