By believing that the Party invented airplanes, Julia shows readers that she accepts unthinkingly much of the Party’s mythology. She cannot remember that Oceania was with Eastasia at war and not Eurasia, and barely understand who Goldstein was. It disturbs Winston that how effortlessly she accepts the Party’s propaganda.
Palpable means that something can be felt or touched. In the short story "the dank tropical night that was palpable as it pressed its thick warm blackness in upon the yacht". The answer is D.
