Which of the below mentioned options allows the user to procure the resources beforehand so that they need not worry about infrastructure availability during the demonstration?

A user is currently building a website which will require a large number of instances in six months, when a demonstration of the new site will be given upon launch.

Which of the below mentioned options allows the user to procure the resources beforehand so that they need not worry about infrastructure availability during the demonstration?
A . Procure all the instances as reserved instances beforehand.
B . Launch all the instances as part of the cluster group to ensure resource availability.
C . Pre-warm all the instances one month prior to ensure resource availability.
D . Ask AWS now to procure the dedicated instances in 6 months.

Answer: A

Explanation:

Amazon Web Services has massive hardware resources at its data centers, but they are finite. The best way for users to maximize their access to these resources is by reserving a portion of the computing capacity that they require. This can be done through reserved instances. With reserved instances, the user literally reserves the computing capacity in the Amazon Web Services cloud.

Reference: http://media.amazonwebservices.com/AWS_Building_Fault_Tolerant_Applications.pdf