Milano Corporation has experienced growth of 20% for each of the last 5 years. Over this 5-year period, Milano's return on equity has never exceeded 15%, its profit margin has held steady at 5%, and its total asset turnover has not changed. Over the 5-year period, Milano paid no dividends and issued no new equity. Based on this information, which of the following can you most likely infer about Milano's performance over the past 5 years?

a. None of the options are correct.

b. Milano's leverage has remained constant.

c. Milano's leverage has decreased.

d. Milano's leverage has increased.