What technological advantage did they have in the battle of britain?

The British developed an air defense network which added a critical advantage in the Battle of Britain. Radar used in the battlefield was an advantage for the Britain.

Explanation:

Radar was invented by Robert Watson-Watt, and uses radio waves to detect warplane, ship, motor vehicles. Radar can also be used in space research center and weather forecasting.

In the Battle of Britain, German warplanes are tracked with the help of radar. This tracking information helped Britain fighters to attack the German.

Royal Air Force helped in winning the Battle of Britain. Air defense network and radar played an important in winning the battle against Nazi Germany.

c. the dred scott v. sandford case,

        i'm fairly sure that the correct answers are 2 and 3.

        i used both my knowledge of world history and the process of elimination to obtain these answers. option 1 cannot be a possible selection because the mandate of heaven belongs to ancient chinese philosophical belief. option 4 sounds like it would benefit the region than detriment it. however, both 2 and 3 explain a potential reason for what could have contributed to the fall of the roman empire.

      hope this ! if i were you, i'd get a second opinion, because i haven't taken this course for a year. best of luck!

***websites that me understand the curriculum better last year are and ***