Correct option is B
Le Play
Pierre Guillaume Frédéric Le Play was a French sociologist and economist known for his studies of family budgets and his typology of family forms (patriarchal, stem, and unstable). He argued that the "unstable family" was a product of social and economic changes, particularly industrialization, which disrupted traditional family structures and weakened social bonds.
ADDITIONAL INFORMATION:
C.H. Cooley: Charles Horton Cooley was an American sociologist known for his concept of the "looking-glass self" and his work on primary groups. While he discussed the importance of the family as a primary group, he did not specifically use the term "unstable family." His focus was more on the role of the family in shaping individual identity and socialization.
Georg Simmel: Simmel was a German sociologist known for his work on social interaction, urban life, and the philosophy of money. While he discussed the impact of modernity on social relationships, including family life, he did not specifically use the term "unstable family." His focus was more on the individual's experience of modern society.
F. Engels: Friedrich Engels, in his book "The Origin of the Family, Private Property and the State," discussed the evolution of the family and linked it to changes in economic systems. While he analyzed the impact of capitalism on the family, he did not specifically use the term "unstable family." His focus was more on the historical and material conditions that shaped family structures.