Sales and average operating assets for Wyeth Company and Genesis Company are given below: Average Sales Operating Assets Wyeth Company $ 20,000 $ 8,000 Genesis Company $ 50,000 $ 10,000 What is the margin that each company will have to earn in order to generate a return on investment of 20%? 8% and 4%. O 12% and 16%. O 50% and 100%. o 2.5% and 5%