A car saleswoman wants to know what percentage of people own cars in a small county in Arizona. She first gathers driver's license data from the Motor Vehicle Department, and then she uses a random selection process to survey 1000 drivers in the county. Lastly, she determines how many of the surveyed drivers own cars. Part A: Which sampling method did the saleswoman use? Part B: Will the saleswoman's method of sampling yield biased results? Why or why not