Renita works as a freelancer. She wants to start her own business, but she does not have the required funding. To meet the working capital for her business, she takes a short-term loan from a bank. The bank agrees to provide her funding up to $50,000, as and when she needs it. However, she can repay the amount immediately or over a pre-specified period of time. Which of the following short-term financing sources does Renita utilize to fund her business in the given scenario?
A. Line of credit
B. Trade credit
C. Commercial paper
D. Factoring