Please answer and explain

Classify the study as either descriptive or inferential. Explain your answer. Data from a sample of citizens of a certain country yielded the following estimates of average TV viewing time per month for all citizens 2 years old and older. The times a stands for first quarter. Viewing method Q1 2011 Q1 2010 Change (%) Watching TV in the home 158:57 158:07 0.5 Watching timeshifted TV 10:21 9:41 6.9 DVR playback 26:46 25:12 6.2 Using the Internet on a computer 25:34 25:59 - 1.6 Watching video on Internet 4:39 3:42 25.7 Mobile subscribers watching video 4:10 3:41 13.1 on a mobile phone . . . Is the study descriptive or inferential? 'O A. The study is inferential, because the statistics are used to make an inference about the population. O B. The study is descriptive, because the statistics are used to describe the sample. O C. The study is inferential, because the statistics are used to describe the sample. O D. The study is descriptive; because the statistics are used to make an inference about the population