Which best explains why constantinople did not fall until 1453?

a. the city was well protected and repelled attacks by invaders.
b. the city created alliances with europeans to stop most attacks.
c. the city was far from byzantine territories and only attacked once.
d. the city created alliances with invaders to stop most attacks.

Which term best describes the progressive era

Need asap). based on the government system in the united states, which individual activity is used to directly influence legislative decisions? source: florida department of education. ( a) watching political debates on television, ( b) gathering signatures for a petition, ( c) discussing political issues at work, ( d) collecting opinions for a yearbook. ( question 2) -- i posted a picture of the question and answer choices.

Which state reflects the view on french conservatives after the congress of vienna