Which of the following is the best method for preparing lactic acid from acetaldehyde? 
Definitions:
Copy Testing
A marketing research technique used to evaluate the effectiveness of advertising content by measuring audience responses before it is aired or published.
Leader-Member Exchanges
The interactions and relationships between leaders and their team members, which can affect performance and satisfaction.
Transformational Effect
A significant change or impact that drastically alters the existing condition, perception, or reality of a situation or entity.
Transactional Effect
The outcomes that result from a series of transactions or interactions, often referring to the consequences of specific actions within an organizational framework.
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