According to NIST, what are the five essential characteristics of the cloud?

A. On-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service

B. Networks, firewalls, storage, applications, and services

C. Platform as a service, bring your own software license, ability to reply applications over the internet, software as a service, and private network

D. On-demand network access, dedicated pool of computing resources, direct attached storage, rapid provisioning, and self service

Reference: https://www.nist.gov/news-events/news/2011/10/final-version-nist-cloud-computing-definition-published#:~:text=The%20NIST%20definition%20lists%20five,or%20expansion%2C%20and%20measured%20service