What is the best way to combine theses sentences using an appositive phrase? (the grand canal in china is a man-made waterway. it is the oldest in the world. the canal is still used today.)

a: the grand canal, which is the oldest man-made waterway in the world, is still used today.
b: the grand canal in china is a man-made waterway, still used, that is the oldest in the world.
c: the grand canal in china, the oldest man-made waterway in the world, is still used today.
d: the grand canal-which is and old, man-made waterway in china-is still used today.

With crack on crack of thunder, zeus let fly a bolt against the ship, a direct hit, so that she bucked, in reeking fumes of sulphur, and all the men were flung into the sea. they came up 'round the wreck, bobbing a while like petrels on the waves. no more seafaring homeward for these, no sweet day of return; the god had turned his face from them. –the odyssey, homer read the passage. then, identify the theme that is supported by the passage. most ships cannot survive a terrible thunderstorm. the ocean is an angry beast that will tame any who try to control it. the gods have the power to control human destiny. men are willing to die to eat the delicious cattle of the gods.