Thomas Laney is a stock analyst and gathered the following information about General Mobile, Inc which he kept watching for long, the ratios are as below:

General Mobile's sales have been constant over time, while industry sales have increased slightly during the same period. From 2007 to 2009, Herndon most likely experienced an increase in the:

A.Cash conversion cycle.

B.Amount invested in working capital.

C.Risk of losing sales as a result of strict credit policies.