Given a text T, and several options, according to the question posed in the text T to choose the most appropriate option from the options as the answer, please directly output the most appropriate option, do not need to output the explanation.

Acompany has arranged a $20 million line of credit with a bank, allowing thecompany theflexibility to borrow and repay any amount of funds as long as thebalance doesnot exceed the line of credit. These arrangements are called:
Option A:convertibles.
Option B:factoring.
Option C:revolvers.

Answer: C