Sherry is the HR manager at a real$-$estate firm. The company's sales have been in decline, and she believes the company is in need of innovation. She wants the employees to be able to continuously identify opportunities in their market, but the company does not currently focus on this. What, specifically, is the firm in need of$?$

a$.$ New leadership

b$.$ Change in corporate culture

c$.$ New employees

d$.$ An entrepreneurial mind$-$set