Answer A is too obvious as a translation of ROI Solutions. Answer B contains no letters and is the approximate value of Pi well-known values are weak passwords. Answer D is a proper name never a good idea. Here is a password checklist:
at least 8 characters
at least one number
at least one uppercase and one lowercase letter
at least one symbol (examples: &, !, @, #, $, ^, *)
no proper names or words (English or otherwise)
no personal information, like your SSN, phone number, or date of birth
no repeating characters
no easy-to-guess patterns like 123qwerty
no well-known mathematical values (like Pi) or equations (E=mc2)
Passwords should never be written down, so you may want to use a free password manager such as LastPass to generate and save your passwords, and to fill in online forms.