✗ Synthetic checks that load the page every minute from three cloud regions
✓Real-user monitoring, which measures page loads in the users' own browsersCorrect
✗ CPU metrics of the web servers
✗ A health check on the load balancer
Why
Synthetic checks run scripted paths from fixed places, so they see only what they were set up to see; they shine at catching an outage when no users are around, such as at night or in a new region. Real-user monitoring sees real devices and networks, but needs traffic and is noisier.