Which of the following would be considered an example of informational influence?
a) A man buys 20 rolls of toilet paper because he sees everyone else doing it and thinks "there must be something they know that I don't about a toilet paper shortage!"
b) A man buys 20 rolls of toilet paper because he sees everyone else doing it and thinks "there must be a sale on toilet paper today!"
c) A man buys 20 rolls of toilet paper because he sees everyone else doing it and thinks "I don't want to be the one weirdo in the checkout line without it!"
d) Both A and B