Exam MS-100 topic 2 question 71 discussion

Is it me, or should the first thing needed not be to Run the SharePoint Hybrid Configuration Wizard? https://learn.microsoft.com/en-us/sharepoint/hybrid/configure-cloud-hybrid-searchroadmap

C. Create a site collection that uses the Enterprise Search Center template. To include content from the on-premises SharePoint Server environment in Microsoft 365 search results, you need to set up a hybrid federated search. The provided article explains that there are two ways to achieve this: inbound hybrid search and outbound hybrid search. In your scenario, you want the users to search for content from Microsoft 365 and include content from the on-premises SharePoint Server environment in the search results. This is referred to as inbound hybrid search. To set up inbound hybrid search, you need to create an Enterprise Search Center in the on-premises SharePoint Server environment using the Enterprise Search Center template. Once this is done, you can configure the inbound hybrid search, which will allow the SharePoint Online search to include the on-premises content in the search results.

A has nothing to do with content search on SharePoint

Prerequisites for outbound hybrid search Before you can configure SharePoint Server to display hybrid federated search results, you have to complete all the steps in the Configure hybrid federated search from SharePoint Server to SharePoint in Microsoft 365 - roadmap. You must also do the following: Perform at least one crawl in the SharePoint Server deployment, so that there is content in the SharePoint Server search index. (The SharePoint in Microsoft 365 content must also be crawled, but you don't have to attend to that because SharePoint in Microsoft 365 crawls its content automatically.) For more info, see Manage crawling in SharePoint Server. Create an enterprise Search Center in the SharePoint Server deployment by using the Enterprise Search Center template to create a new site collection. For more info, see Create a Search Center site in SharePoint Server.