Which decision rule optimistically assumes that nature will always be "on our side" regardless of what decision we make? O a. minimin decision rule. O b. maximax decision rule. O c. minimax regret decision rule. O d. maximin decision rule. A square node in a decision tree is called a(n) node. a. event o b. decision C. random O d. chance The maximin approach to decision-making a. maximizes the minimum regret ob. minimizes the minimum regret c. maximizes the maximum return o d. maximizes the minimum return Which decision rule pessimistically assumes that nature will always be "against us" regardless of what decision we make? o a. maximin decision rule. ob. minimin decision rule. o c. minimax regret decision rule. O d. maximax decision rule