Answer:
B. Klara's master status.
Explanation:
Sociology can be defined as a social science that deals with the study of the socio-cultural interaction of humans with respect to the structure, functioning and development of their society.
The main purpose of sociology is to develop and enhance human knowledge or understanding of important socio-cultural processes through the gathering and analysis of all aspects of the social life of the people living in a society.
A sociologist refers to an individual (scientist) that studies sociology i.e a social scientist.
This ultimately implies that, sociologists study how society affects a group of people and how the people affect the society in return.
A master status can be defined as a definite social position (status) of an individual which typically shapes his or her relationships or interactions with others. Thus, it dominates every other social positions and as such, it's considered to be one of the greatest status in the life of an individual.
Furthermore, a master status is based on factors (status) such as gender, religion, occupation, race, education, ethnicity, sickness, etc.
Basically, a master status for some may include being diagnosed with cancer or acquired immune deficiency syndrome (AIDS).
In this scenario, Klara dedicated her life to helping others experience quality lives no matter what circumstances they faced, haven been diagnosed with breast cancer. This best demonstrate Klara's master status.