______by Columbus in 1492,the island, or at least the western part of it now known as Haiti, was the scene of some of the most advanced political developments in the western world_________the eighteenth century, whose success_________the labor of half a million slaves

A．Discovered ; well in; rested on

B．Discovered; late; relying on

C．Discovering; well in; counting on

D．Discovering; lately ;depends on

甲公司与乙公司签订一项食品买卖合同，但因所在地供电局无故断电，甲公司无法生产，致交付迟延．就此给乙公司造成的损失______．

A．由供电局向乙公司承担

B．由甲公司向乙公司承担

C．由甲公司与供电局向乙公司承担连带责任

D．乙公司可依法向供电局追究责任