Answer:
Everyone, regardless of their culture or age, enjoys humor. However, psychology has only recently recognized it as a crucial, fundamental human habit.
D. It suggests the character's great determination.
Neither is not a coordinating conjunction its a correlative conjunction
An appositive is usually what is separated by commas in a sentence and modifies the subject. So, in this sentence J.M. Barrie's book, Peter Pan, was made into a play and a movie - the appositive is Peter Pan.
