In Calculating Probabilities Using a Decision Tree, Which of the Following

Multiple Choice

In calculating probabilities using a decision tree, which of the following is most correct?

A) The probabilities emerging from any node must sum to 1.
B) The ultimate probabilities assigned to each of the branches (looking at the right hand side of the tree) must sum to 1.
C) The probability assigned to any given branch (looking at the right hand side of the tree) can be no greater than 0.5.
D) Both a. and b. are correct.
E) All of the above are correct.