Its the climax because its says "If Felix had any small doubt about their friendship affecting their fight, it was being neatly dispelled." this means that the conflict has already occurred which had to be a problem in their friendship. However it cant be the falling action because the fight just started. So it must be the climax
Answer: Tom is cheating with another women, Myrtle Wilson and took Nick to meet her. You learn that Daisy is familiar with Gatsby but it does not reveal their history