when science ,businessand art learn somethingof___methods an

C one another's
when science ,businessand art learn something of one another's methods and goals,the world will have come close...
one another 与 each other的用法是一样.它们是Reciprocal Pronouns.不过,each other用于两个人,one another多过两人.
1.The students helped one another.
2.My mother and I give each other a hard time.

D
A and B not right
C wrong way to use