The correct answer is (a) R. Linton.
Robert Linton (1893-1953) was an American anthropologist who is best known for his work on social stratification and status. He argued that society is a network of statuses, each of which has its own set of rights and obligations. He also argued that statuses are hierarchically ranked, with some statuses being more prestigious than others.
H. M. Johnson (1921-1998) was a British sociologist who is best known for his work on social class. He argued that social class is a system of social stratification in which people are ranked according to their wealth, power, and prestige.
M. Fischer (born 1946) is an American sociologist who is best known for his work on social networks. He argues that social networks are important for understanding how people get jobs, find housing, and get other resources.
R. Bierstedt (1916-1999) was an American sociologist who is best known for his work on social power. He argued that social power is the ability to influence the behavior of others.
In conclusion, the correct answer is (a) R. Linton.