GWD7-16,求高人现身

libo6028918

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

我选的D，答案给的B，看了之后发现D的确不如B有效，可是就是不明白 harvest本身就可以做名词，如果再加上ing不是错误了吗？

JayNicholas

HARVEST是收成  已经到手了的  而HARVESTING也是名词  强调的是种植这个动作

Guido2010

the harvesting is a gerund (noun) which makes choice B parrallel.

In addition, I would avoid using "they" because it is unclear what "they" refer to.

ie: the Mochica(singular) developed their(plural).  I think the question itself is faulty.  It would make more sense (at least to me) to have ..... developed "its".