The two most important writers of the last half of the nineteenth century were

The two most important writers of the last half of the nineteenth century were Henry James & Samuel Langhorn Clemens

Explanation:

Henry James was considered by many a key transitional figure between literary realism. He is known for the big quantity of social material he made.  The Portrait of a Lady, The Ambassadors, and The Wings of the Dove. are some examples of that.

Samuel Langhorn Clemens was better known by his pen name Mark Twain. He was a humorist, entrepreneur, publisher, and lecturer. Two of his most famous novels were The Adventures of Tom Sawyer and the Adventures of Huckleberry Finn.

a. protestors wrote narrative about vietnam that run counter to veterans own stories

i think it could possibly be b