The answer is (d), but could be twofold, because people usually attempt at caring to show courtesy, but it’s disingenuous. “How are you?” (while moving to determined location) “good, cause I didn’t care”.
In just that simple story we can relate to it’s truth because we’re all guilty.
What’s the impact?
The impact is poor behavior and communicates a selfish attitude, reflecting ones character.
A difference can be made by that change of character which we’re all capable of making.
I’m not saying to get pissed off at a person who doesn’t practice the appropriate form of genuine concern.
I’m saying to have a heart that is prepared for a different answer upon giving the question. You may not expect the difference you can make by having a heart prepared to make the difference when meeting new people. Learn to care by putting yourself aside and listening with all your heart.