Mr Gopi, While Teaching the CCRA Course to Students Described

Mr. Gopi, while teaching the CCRA course to students described Altman's Model and stated that following variables do exist for Altman's Model:
1) total debt/total assets,
2) retained earnings/total assets.
3) earnings before interest and taxes/total assets,
4) market value equity/book value of total liabilities,
5) sales/total assets Exactly how many variables are incorrectly identified?

A) Exactly Four
B) Exactly One
C) Exactly Two
D) Exactly Three