The most ethical response if an experiment fails to confirm a hypothesis is to revise the hypothesis and develop a new experiment to test it. The correct answer is A.
The one of the reason's why the Allies allied themselves with the soviets was because they wanted to open a new front. The Soviet Front would be so massive and would force Axis's units to spread even more, and to spread resources more. Though they were already spread out.
Think the right answer is b.