Which events led to the United States’ involvement in World War I? Check all that apply. the sinking of the Lusitania
the invasion of Mexican troops
the sinking of the William P. Frye
the sinking of the Woodrow Wilson
the interception of the Zimmerman Telegram
the refusal of Great Britain to trade with the US

What important discovery was made by edmond halley and alexis clairaut, using newton's ideas of mathematics and gravity? they created the scientific method to outline how science should be conducted. they were able to find the orbit of a comet and predict the year of its return. they discovered the three newest planets--uranus, neptune, and pluto. they explained why objects appear to have color.