Explanation/Reference:
Explanation:
SharePoint Online gives us the ability to share individual documents or sites with external users provided that sharing is enabled at the higher levels, parent sites, site collections, tenant.
In this question, we need to share multiple documents with external users and ensure that the external users can access and edit the documents without affecting the security of other content.
To edit documents, the external users will need Contribute access (by way of membership in the Contributors group). To ensure that other content remains secure, we need to ensure that the other content cannot be accessed by the external users. We can do this by separating the documents that should be accessed by the external users into a separate site. Therefore, we should create a new SharePoint team site, move the project documents to the new site and share the new site.