The answer is "B. return on investment".
Rate on Investment (ROI) is an execution measure used to assess the productivity of a venture or look at the proficiency of various diverse speculations. return on initial capital investment endeavors to specifically gauge the measure of profit for a specific venture, with respect to the speculation's expense. To figure ROI, the advantage (or return) of a speculation is separated by the expense of the venture. The outcome is communicated as a rate or a proportion.