Which one of the following, if substituted for the constraint that Wellspring ... ...

Which one of the following, if substituted for the constraint that Wellspring and Zircon each perform in an earlier slot than Xpert, would have the same effect in determining the order in which the bands perform?
(A) Only Uneasy can perform in a later slot than Xpert.
(B) ...
(C) ...
(D) ...
(E) ...

*This question is included in PT70 (Oct 2013): Analytical Reasoning