Consider this experiment: people were asked to write down a random two-digit number on a blank sheet of paper. Then, they were asked to estimate the price of an object (such as a cordless keyboard). The experimenter found a positive correlation between the two numbers - the larger the random 2-digit number, the larger the estimated price of the keyboard. What cognitive bias best explains this result? a) Availability bias b) Anchoring bias c) Confirmation bias d) Halo bias