What is the use of Azure SDKs?

Azure SDKs are designed to enable developers to build and manage applications that run on Azure using a variety of programming languages. This functionality is empowering because it allows developers to leverage the tools, libraries, and APIs specific to Azure services, streamlining application development processes. The SDKs provide efficient ways to interact with Azure resources, handle authentication, and manage network configurations, among other tasks.

While monitoring application performance and usage is crucial for maintaining application health, that function is generally addressed by services like Azure Monitor or Application Insights rather than being a primary role of the SDKs. Similarly, deploying web apps quickly on Azure may be facilitated by tools or services such as Azure App Service, but the SDKs themselves focus on the development aspect rather than just deployment. Creating virtual machines does fall under Azure's capabilities, but this task is often more relevant to Azure Resource Manager (ARM) and related tools rather than the SDKs, which are more centered around application development than infrastructure provisioning tasks.

In summary, Azure SDKs serve the critical purpose of equipping developers with the necessary resources to build robust applications on Azure, making option A the most accurate choice.