Answer the best you can no copying off internet or I’ll report use own words for brainlst

Lee's campaign to invade maryland was stopped after his defeat at the battle of: a. seven pines b. williamsburg c. antietam d. none of these

The national security act of 1947 reflected:

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.