What battle on the russian front ended hitler's plans for dominating europe?

Ineed answers 5 and 6 on my social studies homework reply to this question i posted

Who was william johnson? a. a revolutionary war veteran b. was the most prominent free black in mississippi c. a field slave d. inventor of the cotton gin

What governments allow the use of the initiative, the referendum, and the recall? a. all state governments and the federal government b. some state governments and the federal government c. some state governments d. all state governments