You have a long list of websites (more than 20) that you visit frequently, all of which require an ID and password to access the site and/or files stored there. What would be a risk free way to remember the user IDs and passwords for all these sites?

A) Use the same ID and password for all, and change them frequently (every 30 days).

B) Use the same ID but a different password for all.

C) Scramble the IDs and passwords among the sites and keep a secure record somewhere.

D) Create a base word/in that word/phrase for each site.