Confused how A is incorrect. The video says in order to be selfish it must meet sufficient condition x (benefit charles) or y (less valuable than customary). While the video accounts for why it does not meet the conditions for Y (less valuable) I don't recall it accounting for x. How can we be sure/rule out that it doesn't meet x in this case. Would Charles not spending any money on a gift for his cousin not benefit himself since he paid no money for thus gift (X)?

Spelling error in stimulus description. "assumptionrequired" lol

I would like to join, planning on taking the same LSAT date

Does anyone have advce on how to stop making the suffiency-necessity fallacy error mentioned in Answer B? I keep getting sufficency and necessity confused for one another on all the questions