Which of these military product launches first appeared during World War I and fundamentally transformed battlefield tactics and strategy?

Throughout military history, certain product launches have dramatically altered the landscape of warfare. From gunpowder to stealth technology, military innovations have shaped not only conflicts but entire civilizations. This poll tests your knowledge about one of the most significant military product launches that transformed combat strategies and tactics in the 20th century. Do you know which revolutionary weapon system changed the face of modern warfare when it was first deployed?

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The tank (first deployed by British forces at the Battle of the Somme in 1916)
The aircraft carrier (while early seaplane tenders existed, true aircraft carriers weren't operational until after WWI)
The assault rifle (the first true assault rifle, the StG 44, wasn't developed until World War II)
Radar systems (while early experiments occurred, operational radar wasn't deployed until the 1930s)