It can be inferred from the passage that Walt Whitman_____________

* Hướng dẫn giải

Đáp án : D

Từ cuối câu đầu đoạn 3:….. the condition Walt Whitman called for in 1867 in describing Leaves of Grass: it treats, he said of his own major work,…-> Leaves of Grass chính là “his own major work”