What was the main impact of worker-soldier unity in the February Revolution?

Correct answer: Pressure on the Tsarist government greatly increased

The governing concept is the political force created when mass protest gains support from the armed forces. Workers’ strikes and demonstrations had already challenged the Tsarist government, but the participation or sympathy of soldiers made repression much more difficult and increased the movement’s strength. When soldiers refused to act reliably against the crowds, the government’s authority and coercive capacity weakened sharply. Therefore option A is correct: pressure on the Tsarist government greatly increased. Option B is impossible because the revolution weakened the Tsar’s position. Option C is incorrect because unity did not immediately solve shortages or the food crisis. Option D is also false; the development was an internal revolutionary movement, not the beginning of foreign rule.