Which Google StackDriver features should they use?

As part of Dress4Win’s plans to migrate to the cloud, they want to be able to set up a managed logging and monitoring system so they can handle spikes in their traffic load.

They want to ensure that:

– The infrastructure can be notified when it needs to scale up and down to handle the ebb and flow of usage throughout the day

– Their administrators are notified automatically when their application reports errors.

– They can filter their aggregated logs down in order to debug one piece of the application across many hosts

Which Google StackDriver features should they use?
A . Logging, Alerts, Insights, Debug
B . Monitoring, Trace, Debug, Logging
C . Monitoring, Logging, Alerts, Error Reporting
D . Monitoring, Logging, Debug, Error Report