Do you enjoy being out in the fresh air? (2) Does nature restore your spirits? (3) You might want to consider hiking as a hobby. (4) It's a hobby you can begin with very little expense. (5) All you need to start is a good pair of hiking shoes. Which sentence is the topic sentence in the paragraph? A. Sentence 4 B. Sentence 1 C. Sentence 2 D. Sentence 3