Joe, a User, Is Having Issues When Trying to Access

Multiple Choice

Joe, a user, is having issues when trying to access certain web pages. Upon navigating to a web page, it seems like it connects, but then presents the following message: The security certificate presented by this website was not trusted by a trusted certificate authority. Joe has cleared his cache and cookies, rebooted his machine, and attempted to browse to the website from a coworker's desktop, but it still presented with this error. Which of the following is the MOST likely cause of this error?

A) The web server is missing an intermediate certificate.
B) The website is missing an HTTPS certificate.
C) TLS is not enabled in the browser.
D) The SSL certificate has expired.