Which characteristic of serverless computing enables developers to quickly deploy application code?

Which characteristic of serverless computing enables developers to quickly deploy application code?
A . Uploading cloud service autoscaling services to deploy more virtual machines to run their application code based on user demand
B . Uploading the application code itself, without having to provision a full container image or any OS virtual machine components
C . Using cloud service spot pricing to reduce the cost of using virtual machines to run their application code
D . Using Container as a Service (CaaS) to deploy application containers to run their code.

Answer: A