Answer:
C - Retained Earnings
Step-by-step explanation:
Retained earnings are the cheapest source of equity capital for the following under listed points:
No costs of issuance of a new security in terms of underwriters' fees are required.
It is readily available, it would take days for the company to have access to the right amount of funding
The risk of under subscription where shares rolled for subscription are not subscribed in full is nip in the bud