Which statement is true about compare-and-contrast essays? They examine a problem and provide a realistic a
solution.
They attempt to convince the reader to accept
position on an issue of concern to the of writer.
They attempt to compare the similarities and
differences between two or more subjects.
They examine the relationship between events, explaining how one event or situation causes another.

Hi there!  

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I believe your answer is:  

"They attempt to compare the similarities and

differences between two or more subjects. "

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Here’s why:  

Literature that fall under a 'compare and contrast' structure would discuss the similarities and differences of two or more topics. A compare-and-contrast essay would do the same thing, they would attempt to "compare the similarities and  differences between two or more subjects."The first choice describes problem and solution, the second chose is the purpose of a persuasive essay, and the fourth option describes cause and effect.  

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Hope this helps you. I apologize if it’s incorrect.