Why Did Yeltsin Take Military Action to Stop Chechnya from Seceding

Why did Yeltsin take military action to stop Chechnya from seceding?

A) to retaliate for terrorist attacks carried out in Moscow
B) to stop the Russian Federation from dissolving as the Soviet Union had
C) to ensure continued access to Chechnya's grain and barley
D) to meet the requirements for European Union membership
E) to maintain control of Grozny's ports and train stations