Question

one of our tanks launch long-range rockets at enemy aircraft break the stalemate release chemical weapons in advance attacks on enemy positions

Explanation:

Tanks were introduced in World War I to break the stalemate of trench warfare. Launching long - range rockets at enemy aircraft is not a tank's role, and releasing chemical weapons is not the main function of tanks. So the correct option is related to breaking the stalemate.

Answer:

B. Break the stalemate