Answer: primary_metric

The correct answer is **B. primary_metric**. This parameter allows you to specify the primary metric AutoML will use to evaluate and rank model performance. It ensures that AutoML selects the model that performs best according to your chosen metric. For example, in a regression task, you might specify 'r2' for R-squared as the primary metric. Incorrect options include 'time_col', which is used in forecasting tasks to designate the timestamp column, 'exclude_cols', which excludes specific columns from consideration, and 'max_trials', which controls the number of model trials AutoML conducts. Choosing the right primary metric is crucial for aligning AutoML's model selection with your task's goals.

Author: LeetQuiz Editorial Team