3) The Empire State Building, which has 102 stories, is the tallest building in New York City.

False

Explanation:

The tallest building in New York City is the One World Trade Center. The Empire State Building is actually the third tallest. It does, however, have 102 stories.

Explanation:

The history of democracy is the best topic, because is everybody's interest, aimed to a general community. Other options are too specific, like molecular biology or habits of Tasmanian wombats, theses topics are not general culture, so, as a speaker, probably you are not going to catch public's attention.