Answer:
Mary Edwards Walker dedicated her life to helping people.
Explanation:
In this paragraph, it talks about her providing healthcare (to help people) and her activism (also to help people) and she became a spy (to help her county, and some people)
 
        
             
        
        
        
Answer: She vehemently denied everything
Explanation:
 
        
                    
             
        
        
        
1) The wrong sentence is D. In that case you don't need the possessive pronoum YOUR because what you need is a personal pronoun. YOU'RE is the correct form. However, as it is a question, the most suitable position for the pronoun is after the verb to be. 
2) The incorrect sentence is C. In that case you need the pronoun THERE because the verb comes before its subject.
3) The incorrect sentence is D. In that sentence a personal pronoun +verb to be is needed. As it is talking about the weather the correct way is IT'S. The possessive adjective or possessive pronoun (its) is not correct for that context. 
4) The wrong pronoun is in sentence B. When the sentence starts with the preposition TO you need the pronoun WHOM. The preposition can also be at the end of the sentence.
 
        
                    
             
        
        
        
Answer: Historical 
Explanation:
History is the knowledge and study of past events. History can also be known as the past events and activities that happened to a subject of discussion. For instance, the History of the United States or the History of the Democratic party. 
The text speaks of the Civil War which is a past event so when talking about it in relation to the era it occured, you are speaking to the historical context of that era.