A horticulturist wants to test the effectiveness of four types of fertilizer on the growth rate of Bermuda grass. Six sections of grass are randomly assigned to each of the four fertilizer types, and the rate of growth for each section is measured. An ANOVA F-test rejected the hypothesis of equal means. Each pair of means were then compared, and the 95% confidence intervals are shown below:

A) 1 vs. 2 (-5.267, 3.739)

B) 1 vs. 3 (-11.307, -2.909)

C) 1 vs. 4 ( -11.476, -3.260)

D) 2 vs. 3 (-9.999, -2.688)

E) 2 vs. 4 (-10.132, -3.075)

F) 3 vs. 4 (-3.224, 2.703)

Which tests show a significant difference between the means?

1. C, D, E, F

2. B, C, D, F

3. B, C, D, E

4. B, C, E, F

5. A, B, C, D