Which of the following procedures is TRUE regarding the construction of a decision tree for product$$ design?

A$.$The possible alternatives include an alternative of$$ "doing nothing."

B$.$Payoffs are entered at the beginning of the appropriate branch.

C$.$To determine the expected value of each course of$$ action, we need to start at the beginning of the tree and work toward the end of the tree.

D$.$Be sure that all possible alternatives and states of nature$($beginning on the right and moving$$ left$)$ are included in the tree.