Why is my css to hide comment link not working

Hi

Hoping anybody here can help. Im trying to remove the comment link, category and author. with these css. The only one working is the ” .author.vcard ” the rest are not hiding, how come is that ?

.author.vcard {
display: none;
}

.cat-links{
display: none;
}

.comments-link {
display: none;
}

.posted-on{
display: none;
}