$\backslash$table$[[,$Coffee,Salmon$],[$Brazil$,40,20],[$Alaska$,10,10],[$Table $4-1$: Coffee and Salmon Production Possibilities,$]]$

$($Table $4-1$: Coffee and Salmon Production Possibilities$)$ The table shows the maximum amounts of coffee and salmon that Brazil and Alaska can produce if they just produce one good. The opportunity cost of producing $1$ unit of coffee for Brazil is:

$2$ salmon.

$1/4$ salmon.

$1$ salmon.

$1/2$ salmon.

$20$ salmon