Best-selling author malcolm gladwell let his close-cropped hair grow. after his hair grew longer, he began to receive more speeding tickets and was pulled out of line more frequently for routine security inspections at airports. this is an example of
- primacy effect.
- etiquette.
- carriage.
- wardrobe engineering.

- primacy effect.                                  

Explanation:

Primacy effect: It refers to the process of remembering a piece of information better than a person encountered at first rather than the information encountered later on. In other words, the information retained in the beginning i.e the primacy is considered to be best remembered and more influential even the information is consistent.

In the question above, the statement given is an example of the primacy effect.