Final answer:
Mr. Bennet is disappointed in his marriage due to his and Mrs. Bennet's lack of connectedness and her focus on marrying off their daughters, leading him to seek comfort in books and humor.A) He and Mrs. Bennet have grown apart; He seeks solace in his books and humor
Step-by-step explanation:
Mr. Bennet is disappointed in his marriage because he and Mrs. Bennet have grown apart. Their different temperaments and interests have led to a lack of deep companionship within their marriage. Mrs. Bennet's primary focus on getting her daughters married and her tendency towards silliness and nervousness has left Mr. Bennet seeking comfort elsewhere. To find solace for his disappointment, Mr. Bennet retreats to his library and surrounds himself with books and humor. His love of reading and his sarcastic wit provide him a sanctuary from the disappointments of his marital life and the silliness he perceives in his wife's behavior and in the society around him.