What is an explanatory myth

Based on her speech in the excerpt ,what can we infer about francesca

Why does pumblechook choke on the brandy at christmas dinner? a. he has had too much to drink. b. mrs. joe had only spoiled brandy to serve him. c. pip replaced it with tar water. d. he becomes overexcited telling his story.

Name two events that gatsby tells nick about that nick finds suspect . what proof does gatsby offer ?