When a professor asked the class to name the first fruit that came to mind, over 80% of the students said either apple, orange, or banana. This illustrates that ______

a. students are generally conformists
b. most people are limited by relying on rule-based categorization.
c. these are very prototypical fruits
d. any single concept can be placed into only one category

Answer: C

Rationale: Prototype and exemplar-based categorization allow us to be extremely efficient in recognizing members of a category.