In the sentence "In truth, Verne was neither a scientist nor an engineer: he was simply a writer and a very prolific one. ", the word "prolific" probably means ______.

A．He thinks it is a comedy.
B．This 19th-century vision of the future describes life among skyscrapers of glass and steel, high-speed trains, gas- powered automobiles, calculators, fax machines and a global communications network.
C．It describes the life of an unidealistic young man who struggles to find happiness in the fiercely materialistic dystopia that Paris has become by 1920.
D．He thinks the Jules Verne has once again managed to fire the imagination of people around the world and it is a grim and troubling comment on the human costs of technological progress.

A．Fast-paced adyenture tales heavily flavored with scientific lessons and an optimistic ideology.
B．To mix futuristic narratives with detailed, plausible descriptions of new technology.
C．Through novels such as Journey to the Center of the Earth (1864; translated 1874) and around the World in 80 Days (1873; translated 1874)
D．Bright, entertaining adventure stories that celebrated the possibilities of technology.