Question

一道sat语法问题！！！！！请大家帮忙！！！！！！！！！！

The wide variety of spices and condiments used in sausage making <including salt and, it depends> on the ethnic or regional origin of the recipe, coriander, nutmeg, cloves, garlic, vinegar, mace, pepper, chili peppers, or pistachio nuts.
# (A) including salt and, it depends
# (B) include salt, depending
# (C) includes salt, and it depends
# (D) includes salt and, depending
# (E) including salt and, depending
答案为D，为什么不是C呢
O(∩_∩)O谢谢

Answer 1

it好像是空指代吧，似乎没有什么可以指代的名词，如果是指代“The...making”的话，it是不可以指代句子的。

额...大概是这样吧...

Answer 2

it只能指代前离其最近的具体名词，但在这题里总不能是salt吧