GMAT Critical Reasoning (CR) | #Top150 CR: Lark Manufacturing Company initiated a voluntary Quality

I got this correct, surprisingly. Here's my thought process:

Conclusion: The QC was responsible for the less satisfaction.
The correct answer will not attack this conclusion.

A. The second survey occurred during a period of recession when rumors of cutbacks and layoffs at Lark Manufacturing wereplentiful. (Recession was the reason for less satisfaction)

B. The surveys also showed that those Lark machine operators who neither participated in Quality Circles nor knew anyone who did so reported
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