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 describes privately placed bonds?
Option A:They are non-underwritten and unregistered.
Option B:They usually have active secondary markets.
Option C:They are less customized than publicly offered bonds.

Answer: A