Which of the following is the best approach to creating a strong password that most websites will accept?

A passphrase built from random words is strong because it is long and unpredictable. Long and unique beats complicated and reused. Use a password manager where possible and use a long passphrase when you need to create or remember a password yourself. Adding a symbol only at the end, like an exclamation mark, is one of the most common habits attackers account for when trying to break passwords. It offers very little additional protection. Names, birthdays, and pet names are among the first things attackers try, because they are easy to find on social media.