Answer:
a. How Thoreau protested
Explanation:
In the passage, the author shows how Thoreau protested. The author tells us that Thoreau protested laws that he believed were unfair. This included the Mexican-American War and slavery. Thoreau protested these laws by refusing to pay the poll tax. He was eventually arrested for this practice, and his acts and writings set the basis for civil disobedience all over the world.
C-Not clear and not making sense.
From a dictionary, in-ar-tic-u-late: adjective, lacking the ability to express oneself in speech
Sandy skied into a pine tree and broke her leg is the best way say those sentences together as a compound sentence.