You are developing a model to help your company create more targeted online advertising campaigns. You need to create a dataset that you will use to train the model. You want to avoid creating or reinforcing unfair bias in the model. What should you do? (Choose two.)

A. Include a comprehensive set of demographic features B. Include only the demographic groups that most frequently interact with advertisements C. Collect a random sample of production traffic to build the training dataset D. Collect a stratified sample of production traffic to build the training dataset E. Conduct fairness tests across sensitive categories and demographics on the trained model