The sentence that does not contain any errors in punctuation or capitalization is letter A. The FBI investigated the serious crime. FBI is an abbreviation that means Federal Bureau of Investigation, so it should be written in all capital letters.
        
             
        
        
        
Every is used as a adjective 
        
             
        
        
        
It was immature
of him to do that.
        
             
        
        
        
A. Short answer
http://www.dictionary.com/browse/objective-test
        
             
        
        
        
Answer:
The only sentence among these examples which is punctuated correctly is the second one - The girl walked over to the table on which the book lay, and, without a moment's hesitation, she picked it up and waled out of the room. 
Explanation:
Hope this helps :)