A manager claims, 'Since we installed ergonomic chairs, employee morale has improved significantly. Therefore, the chairs are directly responsible for the boost in morale.' Which of the following is an unstated assumption in the manager's argument?

The correct answer to the question "A manager claims, 'Since we installed ergonomic chairs, employee morale has improved significantly. Therefore, the chairs are directly responsible for the boost in morale.' Which of the following is an unstated assumption in the manager's argument?" is Option B: No other changes or events occurred simultaneously that could have influenced employee morale..

The other options — A) Ergonomic chairs are more expensive than standard office chairs., C) Employees were previously unhappy with their old chairs., D) Improved morale will lead to increased productivity. — are incorrect for this GMAT Exam Prep question. As explained above: The argument assumes a direct causal link between the chairs and morale, ignoring other potential factors that might have contributed to the improvement, such as recent company successes or new benef…