The lines in the 3rd choice suggest resistance from the civilians which were more courageous than those of the armed soldiers.
The soldiers just paraded their weapons and arms haughtily on the streets, which just garnered disrespect from the people. Meanwhile, in the third choice of lines, the civilians attacked savagely to show their vengeance and resistance against the current system.
Their way of attacking is more dangerous and a risk for their lives. Their courage shows when it is stated that they are “ready to die for an idea”, which could mean that they will do anything for their freedom.