In this task you are given a sentence with one coordinating conjunction (for, and, nor, but, or, yet, and so). You must judge whether the order of two coordinated clausal conjoints have been inverted or not. Inversion would result in the sentence sounding unnatural. Label the instances as "Original" or "Inversion" based on your judgment.
Example: He knew it , and he deserved no answer .
Example solution: Inversion
Example explanation: "He knew it" and "he deserved no answer" have been inverted.

Problem: She was surprised he understood and her posture stiffened in defense .

Solution: Original