The correct option is E General tendency to avoid unpleasant truths
The pigeonhole way of life is disturbed when elders are forced to reevaluate things they consider normal, to cross-check aphorisms or customs, which is unpleasant as it might reveal undesirable facts, and destroy stability and peace of a sheltered, small, family unit. Hence, Option E is
correct. The rest of the options do not express this meaning, hence incorrect.