 Given a set of options constituting a decision problem, decision theory recommends an option that maximizes utility, that is, an option whose utility equals or exceeds the utility of every other option. It evaluates an option’s utility by calculating the option’s expected utility. It uses probabilities and utilities of an option’s possible outcomes to define an option’s expected utility. The probabilities depend on the option. Causal decision theory takes the dependence to be causal rather than merely evidential.