One of the Basic Requirements of Probability Is
A)for Each $\ge$

Multiple Choice

One of the basic requirements of probability is

A) for each experimental outcome E_i, we must have P(E_i) $\ge$ 1
B) P(A) - P(A^c) - 1
C) if there are k experimental outcomes, then P(E₁) + P(E₂) + ... + P(E_k) = 1
D) both P(A) = P(A^c) - 1 and if there are k experimental outcomes, then P(E₁) + P(E₂) + ... +P(E_k) = 1