SAT English Practice Question

The author of this excerpt is describing a common misconception about the human body. The writer states that most people assume that the human body is designed to be a perfect machine. However, the text goes on to say that this assumption is incorrect, as the human body is often inefficient and can break down easily. What is the most likely reason why the writer uses the word "however"?

1. A.provide a transition between contrasting ideas.
2. B.emphasize the importance of the writer’s message.
3. C.create a sense of intimacy and connection with the reader.
4. D.suggest that the writer is addressing a large audience.