The answer is B. Ethnicity
This was one of the questions being raised by the United States Consensus Bureau. This had question the identity of many Hispanics or Latinos living in the US. They had made a separate questionnaire whether or not the two should be asked differently or does it have to be considered as one. Many have thought that the Hispanic or Latinos refers to race and ethnicity and should it be asked differently.
brainly.com/question/1446781
The vast majority of them were people ... primarily men ... who hunted and gathered stuff to eat.
Okay so the question is asking you about Nobel's brothers. Noble must have something really big or great and they are asking how his brothers helped his do what he did. They are also asking who you think helped Nobel more.