Considering Decision Trees, Which of the Following Statements Is Not

Considering decision trees, which of the following statements is not correct?

A) A decision tree is a graphical schematic of the logical order with which decisions are made when events occur
B) Decision trees are useful for more complex business decisions
C) Working forward through the decision tree, the expected monetary value of each event node is computed by first weighting possible payoffs by their changes of occurrence
D) Expected value calculations can be made directly on the tree to arrive at the best decision