$\backslash$table$[[,$States of Nature$],[,$Weather related cost per hour$],[$Alternatives$,$Cold cost$/$day$,$Mild cost$/$day$,$Warm cost$/$day$],[$Machine $1,$$$50,$$$40,$$$45],[$Machine $2,$$$45,$$$42,$$$47],[$Machine $3,$$$40,$$$35,$$$54],[$Machine $4,$$$60,$$$25,$$$48],[$Machine $5,$$$45,$$$40,$$$45]]$A plant manager considers the operational cost per hour of five machine alternatives. The cost per hour is sensitive to three potential weather conditions: cold, mild, and warm. The following table represents the operations cost per hour for each alternative$-$state of nature combination:

Using the optimistic criterion, which alternative is best?

A$.$ Machine $5$

B$.$ Machine $4$

C$.$ Machine $2$

D$.$ Machine $1$

E$.$ Machine $3$