What Did Klemens Von Metternich and Alexander I Proclaim at the Troppau

What did Klemens von Metternich and Alexander I proclaim at the Troppau Conference in 1820?

A) Their willingness to allow the establishment of constitutional monarchies as long as male suffrage remained limited to the elite
B) Their agreement to send Austrian troops to crush the revolution in Spain
C) Their support for the principle of active intervention to maintain all autocratic regimes whenever threatened
D) Their refusal to allow France to intervene in the revolutions in the Spanish colonies in Latin America