Which policy should be used to meet this requirement?

Explanations:

Simple routing policy returns only a single resource, not multiple healthy instances. It is designed for straightforward cases where one resource is needed.

Latency routing policy directs traffic to the region with the lowest latency but does not return multiple IP addresses for healthy instances in a DNS query.

Multivalue routing policy allows multiple IP addresses to be returned in response to DNS queries. It is suitable for returning IPs of all healthy instances.

Geolocation routing policy directs traffic based on the geographic location of the user, not based on instance health or multiple IP addresses.