5 points Save Answe Identify the type of observational study (cross-sectional, retrospective, or prospective) described below. A research company uses a device to record the viewing habits of about 5000 households, and the data collected over the past 6 years will be used to determine whether the proportion of households tuned to a particular sports program increased. Which type of observational study is described in the problem statement? A. A random study O B. A prospective study O C. A retrospective study O D. A cross-sectional study