Which of the Following Best Fits the Return on Investment

Which of the following best fits the return on investment measure?

A) Takes the gross revenue estimated minus the cost of the social media advertising program divided by the cost of the program.
B) Employs statistical analysis to determine how sales trends shifted according to the timing of the social media marketing.
C) Calculates the change in the probability of purchase based on the exposure.
D) Calculates the difference between the cost to purchase a display ad on a site and the cost of the social media advertising program divided by the cost of the program.
E) Assigns a financial value to the resources we use to execute a strategy,measure financial outcomes,and calculate the ratio between inputs and outcomes.