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.

Which of the following best describes a negative bond covenant? The requirement to:
Option A:insure and maintain assets.
Option B:comply with all laws and regulations.
Option C:maintain a minimum interest coverage ratio.

Answer: C