Which of the Following Is a Requirement of the Probabilities $\le$

Multiple Choice

Which of the following is a requirement of the probabilities assigned to outcome O_i?

A) P(O_i) $\le$ 0 for each i
B) P(O_i) $\ge$ 1 for each i
C) 0 $\le$ P(O_i) $\le$ 1 for each i
D) P(O_i) = 1 for each i