Q16: GWD-4-34

Building on civilizations that preceded them in coastal Peru, the Mochica developed their own elaborate society, based on cultivating such crops like corn and beans, the harvesting of fish and shellfish, and exploiting other wild and domestic resources.

A     based on cultivating such crops like corn and beans, the harvesting of fish and shellfish, and exploiting

B      based on the cultivation of such crops as corn and beans, the harvesting of fish and seafood, and the exploitation of

C     and basing it on the cultivation of crops like corn and beans, harvesting fish and seafood, and the exploiting of

D     and they based it on their cultivation of crops such as corn and beans, the harvest of fish and seafood, and exploiting

E      and they based it on their cultivating such crops like corn and beans, their harvest of fish and shellfish, and they exploited

答案为B
想请教牛牛们，B中的harvesting与D中的harvest有什么区别呢？
为什么我有印象在哪本书上看到说“如果有自己的名词形式，+ing则是错误的”
不知道大家怎么看......谢谢~