Question $8$

What does the following code snippet do$?$

if event.type $==$ "login":

machines$[$event$.$machine$].$add$($event$.$user$)$

$1$ point

It removes the user from the list of logged$-$in users for the specified machine.

It adds the user to the list of logged$-$in users for the specified machine.

It checks if the event type is $$login$$ and if so$,$ adds the user to the list of logged$-$in users for a specified machine.

It checks if the event type is $$logout$$ and if so$,$ removes the user from the list of logged$-$in users for the specified machine.

A grocery store is developing a loyalty program to reward their customers based on their purchase history. The store wants to a