Answer:
Hz (hertz)
Explanation:
Not really history but Hz is the unit to measure frequency in cycles per second
Answer:
Both the Zimmermann Telegram and British Sinking of the Lusitania.
But, mostly the Zimmermann Telegram
Explanation:
Answer:
France Germany Italy british
Explanation:
these are the main places where the majority of world war 1 occur
This would have to be A. By my research. Sorry if it's wrong. Have a good day!