The correct answers are:

• Two or more Instance Groups: HTTPS Load Balancers in GCP are designed to distribute traffic across multiple backend instances, which are usually organized into Instance Groups (either managed or unmanaged). Utilizing two or more groups ensures traffic distribution and high availability. A single instance group undermines the load balancing benefits.

• Global IP Address (static): A stable entry point for users is essential for an HTTPS Load Balancer, provided by a Global Static IP address. This IP is globally accessible and remains constant even if the underlying instances change, unlike ephemeral IPs which can vary and disrupt connectivity.