A study compares the population mean annual incomes for Hispanics ( 1 ) and for whites (

A study compares the population mean annual incomes for Hispanics (μ₁) and for whites (μ₂₎ having jobs in construction, using a 95% confidence interval for μ₁ - μ₂. Choose the best correct choice.
a. If the confidence interval is (-6000, -3000), then at this confidence level we conclude that the mean income for whites is less than for Hispanics.
b. If the confidence interval is (-3000, 1000), then the test of H₀: μ₁ = μ₂ against H_a: μ₁  ≠ μ₂ with significance level 0.05 rejects H₀.
c. If the confidence interval is (-3000, 1000), then we can conclude that μ₁ = μ₂.
d. If the confidence interval is (-3000, 1000), then we are 95% confident that the population mean annual income for Hispanics is between 3000 less and 1000 more than the population mean annual income for whites.