The primary purpose of sentences 4 and 5 is to distinguish different types and degrees of uselessness, as expressed in option D and explained below.
<h3>What is primary purpose?</h3>
The primary purpose is the most important goal of objective.
An author's primary purpose is his main reason to write something.
Primary purposes can refer to the wholetext or even to a single phrase.
The author's primary purpose for sentences 4 and 5 is to distinguish the different degrees and types of uselessness, which is done through phrases such as "among" and "actually are".
With the information above in mind, we can choose option D as the correct answer.
Chopin is showing us a social situation of the times with the woman as a prisoner of her husband. It is common knowledge that marriages are not always about mutual love between two people and during the time that Chopin was writing, this was more often the case. The story was created in the year of 1894. During that time, it shows how women weren't treated equally/fairly as men.
