What were the major contributions of the H. M.S. Challenger to the study of oceanography? How did its expedition contribute to future studies of the ocean?

It's probably because some types of violets are blue

Are there any words that will you

Ibelieve it would be d. philosophy.hope it !

It's either  a. chiang kai-shek and the nationalists turned against the communists and killed hundreds of them. orb. hundreds of peasants were killed in shanghai during the period of warlord rule.  if we take into account that there was warlord rule at the time, i think that it's b (not entirely sure though)just my best thoughts.