C, the predicate adjective is used to describe the subject, in the predicate.
Write a summary of whatever text you're reading. Visualize scenes and characters in your mind. Make predictions about what will happen next in the text. And keep reading and see if you are correct.
B- casual, relaxed, and indifferent to what others think of him.
Thoreau has a possitive attitude toward the outdoors and believe that all people should return to nature as salvation for them. He believes that cities are bad for us.