Adults learn by:

Adults learn through a variety of methods that encompass testing theories, thinking independently, and engaging in discussions. The correct answer reflects the multifaceted nature of adult learning.

Testing theories or synthesizing content and context allows adults to apply knowledge in practical situations, which enhances their understanding and retention. This hands-on approach aligns well with experiential learning principles, where learning is significantly deepened through real-world applications.

Thinking through ideas themselves emphasizes critical thinking and self-reflection, essential components of adult education. Adults often draw on their previous experiences and knowledge to make connections with new information, facilitating deeper comprehension.

Listening to and sharing ideas highlights the importance of social interactions in learning. Collaborative discussions enable adults to gain diverse perspectives, thereby enriching their understanding and fostering a community of practice.

Incorporating all these techniques—testing, critical thinking, and collaboration—underscores the complexity of adult learning. This holistic approach recognizes that adults do not learn in isolation but rather through a synthesis of experiences, interactions, and practical applications. Hence, the option that states all of these methods are correct is the most comprehensive and accurate representation of how adults learn.