Type of pricing model in AWS

Question:
You will be launching an Amazon EC2 instance to do some testing. You will continue your testing over the course of 6 months. You will terminate the instance at the end of the day to save on costs. This is an example of which type of pricing model?

1. Save when you test
2. Pay less by using more
3. Save when you commit
4. Pay-as-you-go

Answer:
D - is the correct answer. This instance will be used on demand and not kept for long-term usage. This is a classic example of pay-as-you-go pricing. There isn’t a pricing model called "save when you test"