Which design principle should the company use to meet this requirement?

Explanations:

Disposable resources refer to the practice of creating and terminating resources as needed, which can help with scaling and cost efficiency but does not inherently address availability or fault tolerance.

Automation focuses on the use of scripts and tools to manage and deploy infrastructure, improving operational efficiency and reducing human error. While beneficial, it does not directly ensure availability in case of component failure.

Rightsizing involves optimizing resource allocation to ensure that the correct type and size of resources are being used, which can enhance performance and cost efficiency, but it does not address fault tolerance or availability requirements.

Loose coupling is a design principle that emphasizes the independence of application components. By ensuring that components are loosely coupled, the failure of one component does not directly impact others, enhancing overall application availability and resilience.