True answer is A , we need to understand first , what Javascript remoting and what Visualforce Remote Objects mean :

JavaScript Remoting allows JavaScript code on a Visualforce page to call Apex methods directly. This approach is beneficial for scenarios where you need complex server-side logic or want more control over what data is sent to and from the server. JavaScript remoting requires writing Apex code for server-side logic and JavaScript code to call these methods and handle responses.

Visualforce Remote Objects provide a declarative, JavaScript-based way to perform basic CRUD (Create, Read, Update, Delete) operations without writing Apex code. They’re simpler but limited to basic data operations and don’t support complex server-side logic or extensive customization.