Given the transaction data below, compute the confidence of $\{$Milk$\}->\{$Coke$\}$

Transaction ID Items

$1$ Bread, Milk

$2$ Bread, Diaper, Beer, Egg

$3$ Milk, Diaper, Beer, Coke

$4$ Bread, Milk, Diaper, Beer

$5$ Bread, Milk, Diaper, Coke

Question $1$ options:

A$)$

$0\mathrm{.}5$

B$)$

$0\mathrm{.}25$

C$)$

$0\mathrm{.}75$

D$)$

$1$