Of all his six siblings, bernard lived the longest. all his sisters and brothers died of various illnesses at much younger ages than bernard, who died at the age of 92. bernard was most likely high in the personality trait of.

Conscientiousness          

Explanation:

Conscientiousness: The term conscientiousness is one of the personality traits in the Big Five personality trait model or theory. The personality trait is characterized by being diligent or careful. A conscientious person desires to perform well on a specific task, obligations to another person seriously, most organized, and efficient. A conscientious person is considered to be as dependable, hardly misses out anything be it an appointment or something else, hard worker, and honest

An individual who is high on conscientiousness is considered to be as reliable, perfectionist, and responsible.

As in the question above, Bernard lived a long life as compared to his siblings because he was high on conscientiousness and he has done everything perfectly and on time.

its a hope it good luck