A reseаrcher runs а fоrwаrd stepwise regressiоn tо predict customer satisfaction using three candidate predictors: response time, product quality, and price. In Step 1, separate regressions of customer satisfaction on each individual predictor yield the following Adjusted R2 values: Single Variable Model Adjusted R2 of the Model Response time 0.42 Product quality 0.61 Price 0.38 Which variable should be selected and added to the model first?