When using the parametric technique to estimate project costs, you will use the cost estimating relationship (CER). Which of the following best describes the CER? O Calculation to determine the time-value of the money allocated to the project O Comparison ratio of the total estimated project costs and the final costs of a related project O Equation to determine the exact quantity and related cost of the required products or services O based on the relationship between known data points and the characteristics of a product