How did the mutiny of infantry regiments change the direction of the February Revolution?

Correct answer: It changed protest into a crisis of the state's military power

The governing concept is the conversion of a popular protest into a crisis of state power. Before the mutiny, the government could still hope that loyal troops would disperse demonstrators and restore order. When infantry regiments refused obedience or joined the uprising, the state lost confidence in its most important coercive instrument. The revolution therefore moved from strikes and street demonstrations to a direct challenge to the government’s military authority. Option B is correct because it identifies this decisive transformation. Option A is opposite to the evidence, C is false because the mutiny weakened the Tsar, and D invents an unrelated claim about the Soviets.