What Effect Does Gender Have on a Company's Performance

What effect does gender have on a company's performance?

A) Companies in which men occupy 90% or more of the executive positions show better performance than companies with more female executives.
B) Companies in which women occupy 70% or more of the executive positions show better performance than companies with fewer female executives.
C) Companies with no female executives outperform companies with female executives.
D) Companies with a mixture of male and female executives outperform companies with a gender imbalance of executives.