Which of the Following Is a Requirement of the Probabilities $$O _ { i }$$

Multiple Choice

Which of the following is a requirement of the probabilities assigned to the outcomes $$O _ { i }$$

A) $P\left(O_{i}\right) \leq 0$
B) $P\left(O_{i}\right) \geq 0$
C) $0 \leq P\left(O_{i}\right) \leq 0, \text { for each } i$
D) $P\left(O_{i}\right) =1+P\left(\bar{C}_{i}\right)$