What is the main idea of "Kellar and the Rope Trick"? •People should be skeptical about any magic trick performed in India at dusk.
•Magic tricks bring out the worst in people because they play on people's stupidity.
•Most people tend to see what they want to see, and are easily fooled and impressed.
•The Indian rope trick is one of the easiest magic tricks to perform outside.

the purpose of the heading in the passage is to identify who is telling the story.

this excerpt is part of the book sugar changed the world (2010) written by marc aronson and marina budhos. as the book has been written by two people, the heading "marc" indicates that this specific excerpt is being narrated by aronson. in the fragment, marc describes his grandfather's story after hearing it from his cousin. however, there are other excerpts where budhos is the one that tells the story of her family.

aronson and budhos, who are husband and wife in real life, decided to write sugar changed the world when they found out how sugar, which had an important role in slavery and economy, changed their ancestors' lives.