For a particular maximization problem, the payoff for the best decision alternative is $$1$ million while the payoff for one of the other alternatives is $$12\mathrm{.}9$ million. The regret associated with the alternate decision would be

$$28\mathrm{.}6$ million.

$$15\mathrm{.}7$ million.

$$0\mathrm{.}129$ million.

$$2\mathrm{.}8$ million.