MCQ: In the context of web security, what does the Expect-CT header aim to enforce?

• A. Expect-CT does not impact web security.
• B. To enforce the use of HTTPS by indicating that a web server should only be accessed over a secure connection.
• C. To control how much referrer information should be included in requests.
• D. To enforce Certificate Transparency (CT) and ensure that only valid certificates are accepted.