'Poverty is regarded as a social problem' which was the outcome of a survey research on poverty in London. Who was the Scholar of this research ?

Charles Booth (1840–1916) was a pioneering British social researcher famous for his extensive survey titled Life and Labour of the People in London, published between 1889 and 1903. His empirical research was groundbreaking because it demonstrated that poverty was a social problem caused by structural factors such as low wages, unemployment, and lack of social security, rather than just individual moral failings. Booth is also credited with introducing the concept of the 'poverty line'. While Henry George (Option A) wrote Progress and Poverty focusing on land taxation, and Kingsley Davis (Option D) was a 20th-century sociologist known for functionalist theories, it was Booth's London survey that fundamentally changed the academic and political understanding of urban poverty as a measurable social phenomenon.