A firm wants to reduce its cash conversion cycle sharply. Which of the following actions should it take?

a. The company increases its average inventory without increasing its sales.

b. The company reduces its DSO (days sales outstanding).

c. The company starts paying its bills sooner, which reduces its average accounts payable without reducing its sales.

d. The company sells an issue of long-term bonds and uses the proceeds to buy back some of its common stock.