Which one of the following is a valid lambda expression? Group of answer choices event $->\{$ account.deposit$($getAmount$())$; $\}$ event $->\{$ account.deposit$($getAmount$())\}$ new EventHandler$($event$)\{$ account.deposit$($getAmount$())$; $\}$ event $=>\{$ account.deposit$($getAmount$())\}$ event $=>($ account.deposit$($getAmount$()))$