Which one of the following statements relating to sources of finance is correct?

A$.$Retained profits are a free source of finance to a business.

B$.$ Invoice discounting involves the invoice discounter taking over the management of the trades receivables of a business.

C Investors normally view loan capital as being more risky than preference shares.

D Finance leases involves the lessee $($the user of the assets$)$ taking over substantially all the risks and rewards of ownership.