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The suffix "-ance" is used to form nouns denoting an action or process. In the case of "maintenance," it refers to the action or process of preserving something. Therefore, the synonym of "maintenance" would be:
A) preservation
Preservation is the act of maintaining or keeping something in its original state or preventing it from decaying or being damaged. So, in this context, "preservation" is a synonym for "maintenance" because both involve the idea of keeping something in good condition.
