Match the following with the left side consisting of benefits of a cloud computing system with its explanation on the right side.
i. Scalable A. Protect data, apps, and infrastructure from potential threats.
ii. Elastic B. Achieved by data backup, disaster recovery, and data replication services.
iii. Reliable C. Increase or decrease the resources and services used based on the demand or workload at any given time.
iv. Secure D. Ability of a cloud computing system to automatically add or remove resources with changing workload.