Please help MEH GIVING BRAINLEST!!!!

Letter from Philadelphia Read the following sentences, and then select the correct answer from the drop-down menu. This quotation deals with which of the following aspects of the convention: . “All communications of the proceedings are forbidden during the sitting of the Convention; this I think was a necessary precaution to prevent misrepresentations or mistakes.” – Delegate George Mason of Virginia Letter to his son June 1787

Drop down menu:
A. Rule of secrecy

B. Election of a leader

C. Reason for holding the convention