which of these was used during a war for the FIRST time during World War || ? a )airplanes b) telegraph c) penicillin d) machine guns

C) Penicillin

Explanation: Soldiers During WWII for the first time ever used Penicillin to fight off infections from wounds in the trenches the most effective at doing that was Penicillin. In WWI they used Airplanes, Telegraph and Machine guns already but In the second WW they tried using Penicillin

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the number of senators, and representatives, the state has in congress.

answer; participants attitudes about gun control;