What is a common cause of the error message "curl failed to verify the legitimacy of the server and therefore could not establish a secure connection to it," and how can it typically be resolved?
A) The server is using an outdated protocol; updating the server software is the solution.
B) The client lacks the necessary SSL/TLS certificates; installing the required certificates can resolve the issue.
C) The network connection is unstable; resetting the router can fix the problem.
D) The server is overloaded; waiting and trying again later usually helps.