In a project, you're required to fetch data from multiple REST endpoints simultaneously and display it only when all the data is available. Which Axios method would be most suitable for this?

To fetch data from multiple REST endpoints simultaneously and wait for all the data to be available before proceeding, you should use 'Axios.all()' to make multiple requests concurrently. 'Axios.parallel()' and 'Axios.concurrent()' are not standard Axios methods, and 'Axios.series()' would make requests sequentially, not concurrently.