Sam uses public transport to commute to work. however, he has always wanted to own a car and believes commuting by car will save time. this scenario exemplifies sam's a. selective retention b. cognitive dissonance c. value d. need

The scenario in which Sam uses public transport to commute to work but however, he has always wanted to own a car and believes commuting by car will save time. exemplifies Sam's cognitive dissonance.
Correct B
Every situation that involves conflicting attitudes, beliefs or behaviors is referred to as cognitive dissonance.

I believe the answer is: D. need
In this context, needs refers to the things that would bring people one step closer to fulfilling their goals. In general, needs is divided into basic needs (which include foods and drinks) and tertiary needs (which include comfort products such as make up, transportation, good clothes).