The correct answer is A. Main ideas
Explanation:
In texts or speeches, the purpose of the author or speaker is always to explain a central idea that is related to a specific topic, situation or issue. Additionally, the central idea is developed through main ideas, which are more specific than the central idea and act as detailed points of it. For example, in a persuasive speech the main ideas are the key reasons that support the author's position, in the same way, in the case of a text that explains the effects of global warming the details or main ideas to explain the topic are the more important effects of global warming in terms of ecosystems, health, economy, etc. According to this, the main ideas there the ones that are detailed points of focus for developing your central idea.
 
        
             
        
        
        
Answer:
The mentally ill were sometimes experimented on with treatments that sometimes caused more harm than good. 
Explanation:
This passages points out both the good intentions and the harmful consequences of trying out new treatments on human subjects in the asylums.
It states that the institutions wanted to offer new and effective treatments to the patients, but that these were rudimentary and poorly understood and developed. This lack of refinement led to worse conditions for many of the mentally ill. 
 
        
             
        
        
        
Answer:
C. Symbolism
Explanation:
Symbolism is defined as "the use of symbols to represent ideas or qualities."
Bud's suitcase is a symbol of his survival.
 
        
             
        
        
        
<span>The concern with getting daughters married into good families pervades Jane Austen's Pride and Prejudice and forms a large part of the social mannerisms that the novel mocks. The lines in this excerpt that one of the Bennet parents make an ironically false claim about having gone to great lengths to achieve that goal is to be present in almost every party the Bingley and Darcy proposes.</span>