The correct answer is C. Blithsome.
The word "blithsome" is not a real word. The correct spelling is "blithesome".
"Blithesome" means "happy and carefree". It is an adjective.
"Bourgeoisie" is a noun that refers to the middle class.
"Beverage" is a noun that refers to a drink.
"Behaviour" is a noun that refers to the way someone acts.
