PLSZS I NEED HELP What inventions did the armillary sphere, astrolabe, and sundial ultimately led to the development (nowadays inventions)? Give me the resource you found the answer.

john maynard keynes developed new economic theories in response to the stock market crash of 1929. great depression of the 1930s. first and second world wars. economic boom of the 1950s.

majority rule is most important in a representative democracy.

i believe the answer is the last option, the magyars preferred to invade by land.

i hope this ! : )