Sociology has three levels of inquiry. At the macro level, sociology investigates the structure and change of the societies or social institutions. In other words, macrosociology studies the analysis of large-scale social organizations such as political or economic systems. At the meso level, which is known as mesosociology, sociologists study the experiences of groups and the interactions between groups. At the micro level, namely microsociology, sociologists investigate the smallest levels of interaction, such as the everyday behaviors in face-to-face interactions. Microsociology studies may include interactions between friends or couples, or only the perception of the self. The correct answer is Choice D.