Which Among the Following Is the Strongest Determinant of an Industry's

Which among the following is the strongest determinant of an industry's technological progressiveness?

A) the scientific character of its industry and the number of technological opportunities available
B) the size of the industry concentration ratio-the lower the ratio, the greater the firm's technological progressiveness
C) the Herfindahl index in the firm's industry-the higher the index value, the greater the firm's technological progressiveness
D) the amount of retained earnings in the industry