The correct answer is D. Citizens are expected to help other people in need.
Explanation
In the image of the question, you can see how a man helps a woman by opening the door for her because her hands are busy pushing her baby's car. Furthermore, he responds to her thanks saying "It´s the least I can do for fellow citizens". Additionally, the image contains a small paragraph that refers to what citizens are expected to do in addition to following the laws and respecting others, being kind to other people, and helping those who need it. According to the above, the central idea of the image is D. Citizens are expected to help other people in need.