What is really guaranteed in Azure SLA?

Hi All

Looking for some clarification on what is guaranteed in an Azure Service Level Agreement (SLA).

Is it the :
       A. uptime 

        Or 
      B. feature availability

One of the the below two links says it is for feature availability and the other says uptime and connectivity. So which one is the correct answer if I had to answer this on the exam?

https://azure.microsoft.com/en-us/support/legal/sla/summary 

https://azure.microsoft.com/en-us/support/legal/sla 

Thanks

MK

Ask in the azure forum to confirm