HIV is a sexually transmitted virus that destroys the blood cells that help the body fight diseases. What would be the most reliable way to detect whether a person has been infected with HIV?

Which statement best describes how the loudness of the sound affects the high-pressure region created by the sound wave? a. a louder sound has no effect on the pressure created. b. a louder sound means a high-pressure region that is higher. c. a louder sound means a high-pressure region that is not as high.