Pat thought he had received the best deal on his new car. Shortly after buying the car, Pat started to notice certain disadvantages of his new car as he learned more about other cars available in the market. Pat is experiencing .

 Cognitive dissonance

Explanation:

 The cognitive dissonance is one of the situation that occur when the people are involve with the contradictory values, thoughts and the ideas and the cognitive dissonance is basically producing the mental discomfort process.

According to the given question, the Pat is experiencing the cognitive dissonance due to the different thoughts about the new car. The cognitive dissonance is one of the psychological concept that helps in resolving the contradictory thoughts.

 Therefore, Cognitive dissonance is the correct answer.  

answer; i believe the correct answer is (general);

it would be d). more resources must be obtained to attain that combination of goods and services