Not every action is a social action. Social action is an action which is oriented towards the past, present or future actions of the other people. For example, taking revenge out on someone or buying a burglary insurance are social actions. If two people on the way change their directions because of only personal reasons, this is not a social action. However, if they think they are going to crash each other and they change their directions in order to prevent this clash, this is a social action. In short, if an action is made towards other people’s actions, it is a meaningful social action. The correct answer is Choice D.