Which of the following allows a marketer to compare its performance on some dimension to other things,such as how competitors are doing or how its own efforts fluctuate over time?

A) BVI.
B) ROI.
C) A baseline metric.
D) AEV.
E) A measurement map.

A baseline metric is a standardized measure that allows a marketer to compare performance over time or against competitors. It provides a starting point to measure progress or identify areas for improvement. BVI (Brand Value Index) and AEV (Advertising Equivalent Value) are specific metrics related to brand equity and advertising effectiveness, respectively. ROI (Return on Investment) is a financial metric that measures the effectiveness of an investment. A measurement map refers to a visual representation of how different metrics relate to each other.