(1) According to a Number of Research Studies, Owning a Pet

(1) According to a number of research studies, owning a pet dog provides important health benefits. (2) One positive effect of dog ownership is better overall physical health. (3) Because many dog owners walk their pets on a regular basis, they tend to get the recommended 30 minutes of exercise every day. (4) This daily activity helps prevent cardiovascular disease, contributes to weight management, and keeps dog owners in overall good physical shape. (5) A second positive effect of dog ownership is better emotional health. (6) Dogs provide their owners with affection and steady companionship. (7) Therefore, the animals often prevent or decrease feelings of loneliness and depression. (8) Studies have shown that the emotional connections people have with their pet dogs lower their heart rate and blood pressure. (9) As a result, dogs lower their owners' stress levels. (10) Other studies reveal that dogs owners appear to get sick less frequently than people who don't own dogs do, and they also recover faster when they do become ill. Select the number of the topic sentence in the paragraph above.

A) Sentence 1
B) Sentence 2
C) Sentence 10