Below is the output of several different models that Caterpillar has built to predict next quarter sales. Caterpillar predicting Next Quarter Sales R2 R2adj Model A (3): Weather, recent quarter sales, housing starts 0.56 0.69 Model B (3): Interest rates, worldwide GDP, housing starts 0.59 0.58 Model C (3): Weather, worldwide GDP, housing starts 0.58 0.57 Which model is the optimal combination of explanatory variables Question 3 options: a) D b) B c) A d) C