If the Confidence Interval for the Difference in Treatment Means

If the confidence interval for the difference in treatment means contains zero, then:

A) We can conclude that there is a significant difference in the selected treatment means.
B) We can conclude that there is no significant difference in the selected treatment means.
C) We can conclude that the selected treatment means both equal zero.
D) We can conclude that at least one of the selected treatment means equals zero.