Identify a true statement about preferred provider organizations $($PPOs$).$

$q,$

They offer lower deductibles and copayments for out$-$of$-$network care than for in$-$network care.

$q,$

They usually fail to cover preventive services.

$q,$

They allow patients to get care in or out of the network, but there is an in$-$network gatekeeper who must approve all services.

$$

$q,$

They pay $80$ to $100$ percent for what is done within the network but only $50$ to $70$ percent for services rendered outside it$.$