A researcher is interested in estimating how many University of Tasmanian students have downloaded the Government's COVID-SAFE app onto their mobile phones. They are considering two approaches to gathering the relevant data: Option A: Stand outside the University libraries and interview students as they come out. Do this until you have interviewed 50 students. Option B: Choose a single first-year unit (such as Good Thinking XBR105!) and email the first 50 students on the class list. Which of these options do you think will be most effective? Give a reason for your choice and explain how the option you choose could be further improved. (As a rough guide, it is expected your answer will consist of 1-3 paragraphs.)