MIT Researchers Determined That 90 Percent of Shopper's Credit-Card Transactions

Multiple Choice

MIT researchers determined that 90 percent of shopper's credit-card transactions could be used to:

A) Uniquely identify an individual's shopping habits and preferences.
B) Collect individual social security numbers.
C) Identify an individual shopper using only four bits of secondary information.
D) Both A and C, but not B.