If Amy has no idea which of the three mileage assumptions is most appropriate, what is the recommended decision $($leasing option$)$ using the optimistic, conservative, and minimax regret approaches?

The recommended decision using the optimistic approach is

Dealer A

Correct: Your answer is correct.

$.$ The recommended decision using the conservative approach is

Dealer C

Correct: Your answer is correct.

$.$ The recommended decision using the minimax regret approach is

Dealer A or B

Incorrect: Your answer is incorrect.

$.$

$($d$)$

Suppose that the probabilities that Amy drives $12,000,15,000,$ and $18,000$ miles per year are $0\mathrm{.}5,0\mathrm{.}4,$ and $0\mathrm{.}1,$ respectively. What option should Amy choose using the expected value approach?

EV$($Dealer A$)=$ $

EV$($Dealer B$)=$ $

EV$($Dealer C$)=$ $

The best decision is

$---$Select$---$

$.$