Assume that a job involves $2$ activities $($x and y$.$ and $3$ resources $($A$,$ B$,$ & C$).$ Resource A is busy for $10$ minutes on activity x and is not used on activity y$.$ Resource B is busy for $10$ minutes on activity x and $10$ minutes on activity y$.$ Resource C is not used on activity x and is busy for $10$ minutes on activity y$.$ If $1$ unit of each resource is available and multiple resources can work on a job at the same time and, $1$ job is on the schedule the utilization of A$,$ B$,$ and C will be:

$10/20,10/20,$ and $10/20$

O $10/40,20/40,$ and $10/40$

$10/10,10/10,$ and $10/10$

$05+5+5+5$ minutes

O none of the above