Understanding Pay-as-you-go Pricing

D.

Measured service is the aspect of cloud computing that pertains to cloud services and resources being billed in a metered way, based only on the level of consumption and duration of the cloud customer.

Although they sound similar to the correct answer, none of the other choices is the actual cloud terminology.

The aspect of cloud computing that pertains to cloud customers only paying for the resources and services they actually use is known as "metered service".

Metered service refers to the practice of charging customers for their actual usage of cloud resources, rather than charging a flat rate for a set amount of resources. In other words, customers are charged based on how much they actually consume, rather than based on how much they might potentially use.

Metered service is made possible by the fact that cloud providers are able to monitor and measure resource usage in real time, allowing them to accurately track usage and bill customers accordingly. This can be especially beneficial for customers who have fluctuating or unpredictable resource needs, as they are able to scale their usage up or down as needed without incurring unnecessary costs.

It's worth noting that while metered service is often used interchangeably with terms like "measured billing" and "metered billing," these terms can sometimes refer to slightly different concepts. However, in the context of this question, metered service is the most accurate answer.