Restructuring a diversified company's business lineup involves which one?

a. revamping of the value chains of each of a diversified company's businesses

b. focusing on restoring the profitability of its money-losing businesses and thereby improving the company's overall profitability

c. revamping the strategies of its different businesses, especially those that are performing poorly

d. divesting some businesses and acquiring new ones so as to put a new face on a diversified company's business makeup

e. broadening the scope of diversification to include a larger number of smaller and more diverse businesses