An Urban Planning Group Is Interested in Estimating the Difference

An urban planning group is interested in estimating the difference in mean household income between two neighborhoods. They obtain the following 95% confidence
Interval: 95% CI for difference: (-5693, -4107) . Which of the following is true?

A) This is a paired design.
B) There is no significant difference in the mean household incomes between the two
Neighborhoods at α = 0.05.
C) There is a significant difference in the mean household incomes between the two
Neighborhoods at α = 0.05.
D) Both A and B.
E) Both A and C.