Which one of the following, if substituted for the constraint that Wellspring and Zircon each perform in an earlier s...

Sangwook on September 26, 2015


I do understand why the correct answer goes to A, but I do not understand why the choice (C) wouldn't be the answer. Thanks,


Melody on September 29, 2015

The issue with answer choice (C) is that it allows for Z to be before or after Z, whereas before X was clearly only allowed before X.

Hope that helps clear things up! Please let us know if you have any other questions.

Sangwook on September 30, 2015

Aha~ thanks a lot!!!^^