After a Disaster,one Citizen Was Most Impressed with How Much

After a disaster,one citizen was most impressed with how much his neighbors went out of their way to help rescue him and take him to the emergency shelter.What is the most likely reason why his neighbors helped him?

A) They feared that he would sue them if they did not help him.
B) They hoped that,because he was very wealthy,he might give a reward for their help.
C) Such help is part of the pattern of behavior during the heroic phase of reaction to a disaster.
D) Such behavior is what any American would expect of a neighbor today.