1. The problem asks for the number of students who have six or more people living in their household. 2. From the graph, the categories with six or more people are "6-7 persons" and "8-9 persons". 3. The number of students in the "6-7 persons" category is 4. 4. The number of students in the "8-9 persons" category is 2. 5. To find the total number of students with six or more people in their household, add these two numbers: $$4 + 2 = 6$$ 6. Therefore, the number of students who have six or more people living in their household is 6. 7. The correct answer is B. 6.