Identify a true statement about the On-Demand instances purchasing option provided by Amazon EC2.

Identify a true statement about the On-Demand instances purchasing option provided by Amazon EC2.
A . Pay for the instances that you use by the hour, with no long-term commitments or up-front payments.
B . Make a low, one-time, up-front payment for an instance, reserve it for a one- or three-year term, and pay a significantly lower hourly rate for these instances.
C . Pay for the instances that you use by the hour, with long-term commitments or up-front payments.
D . Make a high, one-time, all-front payment for an instance, reserve it for a one- or three-year term, and pay a significantly higher hourly rate for these instances.

Answer: A

Explanation:

On-Demand instances allow you to pay for the instances that you use by the hour, with no long-term commitments or up-front payments.

Reference: http://docs.aws.amazon.com/AWSEC2/latest/UserGuide/reserved-instances-offerings.html