Problem: Read the following paragraph, which does not include a topic sentence. Then, from the choices that follow, identify the statement that would be the most successful topic sentence for this paragraph. First, increased perspiration could be a telltale sign of lying. Polygraph machines actually measure perspiration. A second giveaway relates to the touching of the face and nose. A person who is lying will experience an increased itching in the nose due to adrenaline. Finally, a quick and fleeting microexpression, such as the drawing upward of the eyebrows, could suggest that someone is not being truthful. a. Physical signs can suggest whether or not a person is lying. b. Physical signs can suggest whether or not a person is telling the truth. c. Law enforcement uses advanced technology to detect lying. d. A psychologist can detect lying roughly 90 percent of the time. Why did you choose the answer you did?