It means unclear or unknown
An idiosyncrasy is a characteristic, habit, mannerism, or the like, that is peculiar to an individual.
The finishing point constructed by Twain is: when the old man is about to finish the story of Jim Smiley's jumping frog, another individual interrupts him. The narrator tries to leave the place, but the old man reaches it. The story ends with the old man who starts telling the narrator about a yellow cow with only one eye of Jim Smiley.
Answer:
a) construction of tall buildings
Explanation:
Since the buildings during this time period were being built bigger and bigger there was more demand for elevators so people could get from floor to floor. Hope this helped :)
