A company needs to monitor its website's availability to end users.

Create an Amazon CloudWatch alarm that is based on the website’s logs that are published to a CloudWatch Logs log group. Configure the alarm to publish an SNS notification if the number of HTTP 4xx and 5xx errors exceeds a specified threshold.

Create an Amazon CloudWatch alarm that is based on the website's published metrics in CloudWatch. Configure the alarm to publish an SNS notification based on anomaly detection.

Create an Amazon CloudWatch Synthetics heartbeat monitoring canary. Associate the canary with the website’s URL. Create a CloudWatch alarm for the canary. Configure the alarm to publish an SNS notification if the value of the SuccessPercent metric is less than 99%.

Create an Amazon CloudWatch Synthetics broken link checker monitoring canary. Associate the canary with the website’s URL. Create a CloudWatch alarm for the canary. Configure the alarm to publish an SNS notification if the value of the SuccessPercent metric is less than 99%.