需要语义来解题，C的fish加上了限定性从句，意思就错了。

actually, no, it's not essential. the "in contrast to some" already covers that base.

for instance, consider the following:
in contrast to some other restaurants in the area, Les Jardins only serves beer and wine, not hard liquor.
--> this sentence ALREADY implies that "some other restaurants" serve hard liquor. therefore, if you're going to add that reference for emphasis, you should make it a nonessential modifier:
in contrast to some other restaurants in the area, which serve a range of hard spirits, Les Jardins only serves beer and wine, not hard liquor.

for the same reason, you want commas around this modifier. if you don't have them, the sentence actually becomes redundant!

b) 非限制性定语从句，所有格表示一种拥有的关系
c）限制性定语从句，表示的是其修饰名词的一个子集
类似woman teacher；woman's teacher

c的意思表达的是一种是“卵孵化需要数月的鱼”，还有一种“卵孵化不需要数月的鱼“，孵化数月只是一种鱼，所以逻辑上不如b好

the word "have" in choice (c) creates a slight but noticeable change of meaning (remember that you have to read VERY literally). specifically, it shifts the focus to those fish that have the eggs, i.e., are in literal possession of the eggs. that's not the point of the sentence; the point is just that some fish produce eggs that require months to incubate, whether they "have" those eggs or not.

have：
不能说鱼拥有蛋，蛋就是鱼创造出来的，没有鱼就没有蛋，就如不能说人拥有头发，是人的头发；不能说家庭拥有电，不能说中国拥有建筑，是建筑在中国；可以说中国拥有13亿人
in contrast to，介词，后面+名词，表示与……相反，与主句的某个名词构成比较

体会bc语义差异；c限制性定从，从句focus on “have”这个动作、b非限制性定从，从句focus on “require”

体会bc语义差异；c限制性定从，从句focus on “have”这个动作、b非限制性定从，从句focus on “require”

the word "have" in choice (c) creates a slight but noticeable change of meaning (remember that you have to read VERY literally). specifically, it shifts the focus to those fish that have the eggs, i.e., are in literal possession of the eggs. that's not the point of the sentence; the point is just that some fish produce eggs that require months to incubate, whether they "have" those eggs or not.

B 非限制性定语从句，表明一些鱼类，所有这些鱼类的卵孵化需要数月，
C 限制性定语从句，将一些鱼类分成了两类，即：“卵孵化需要数月的鱼”和“卵孵化不需要数月的鱼“两类
根据语意，即然句子要表达的是与silvery minnow这种鱼卵的情况来比较，那么就不可能用可以分成两种情况的鱼来比较，故限制性定语修饰错误，应用非限制性定语，B正确。

c 选项说：不像有些鱼，有蛋，其蛋需月而能化.....这不搞笑呢

错选C，尽管C中that表限制性定从修饰，但其定从核心词为have （eggs）, 而B核心词还是require，根据后文题意，应该核心词是require

请问老师，BC之间，C用了限定性定语从句，我觉得这样意思更准确，就是那些xxx的鱼和后面的鱼进行对比，如果只是B这样的非限定性定语从句，反而遗漏的句子的核心意思。但为什么最后答案是B呢？C有什么错误超越了定语从句的差别？谢谢！