What did Columbus bring back on his second trip

A．is reluctant to take on family responsibilities
B．believes that life will be more cheerful if he remains single
C．finds more fun in dating than in marriage
D．fears it will put an end to all his fun adventure and excitement

A．Captain Nash saw twelve orange lights moving at a fantastic rate of speed
B．Captain Nash may have been the first to see lights in space
C．according to an interesting theory, the orange lights are space animals
D．the mysteries of nature can be completely explained