A researcher wants to study if being stuck in a construction zone on the highway will make people more impatient in their driving once they leave the highway. He sets up a camera near an intersection just off the highway and measures how many cars previously stopped on the highway by construction run the yellow or red light at the intersection. This study is an example of a .

- Naturalistic Observation

Explanation:

'Naturalistic Observation' is characterized as the study design where the researchers examine the target subjects and their behaviors(they want to know about) in their natural surroundings without any kind of interference or manipulation.

As per the question, the given situation exemplifies a 'naturalistic observation' research pattern as the study is being conducted in natural settings, and the actual and spontaneous behavior of the drivers would be observed through the camera directly. Such a research method allows a first-hand view of the behavioral patterns that further assists in making worthy and credible deductions.

the answer would be in this answer. someone already asked the question.  

i am pretty sure it is d.