If you visit a website and your browser notifies you that the certificate can't be verified, usually the cause of this is that . (1 point)
the certificate is expired
the certificate doesn't exist
there is no encryption on the website
the certificate server is unreachable

Pthreads programming: create and terminate a thread write a c++ program that creates a thread. the main will display a message “hello world from the main”. the main will create a thread that will display a message “hello world from the thread” and then terminates with a call to pthread_exit()