Why did the author's brother decide to buy "Tender Buttons"?

The choice that states the brother decided to buy "Tender Buttons" to understand Gertrude Stein's writing better reflects a motivation grounded in a desire for knowledge and comprehension. This indicates that he was likely interested in delving into Stein’s unique and avant-garde style, which is characterized by its experimental use of language and form. Purchasing the book for this reason suggests that he sought to engage with the complexities of Stein's work, perhaps to enhance his own literary appreciation or skill.

In the context of the other choices, while they present alternative motivations, they do not align as closely with the idea of seeking understanding. For instance, critiquing the book for a publication implies a more professional engagement rather than a personal or educational one. Collecting rare literature suggests a focus on the value or rarity of the book itself, which does not inherently involve an interest in its content. Supporting his sister's artistic endeavors may indicate a familial bond or encouragement but does not necessarily imply the need to understand the work itself. Therefore, the emphasis on understanding Stein's writing aligns accurately with the decision to purchase "Tender Buttons."