SAT语法题为什么会选Ait不是代词吗前面没有所指难道it指的是each两个代词可以互相指代?InneighborhoodsthroughouttheUnitedStates,onecanencounterhundredsofdifferentrope-jumpinggames,（eachwithitsownr

Question

SAT语法题 为什么会选A it不是代词吗 前面没有所指 难道 it 指的是each 两个代词可以互相指代?
In neighborhoods throughout the United States,one can encounter hundreds of different rope-jumping games,（ each with its own rules）
A通上
B each having their own rules
C when they each have their own rules
D which has its own rules
E theu each have rules of their own

Answer 1

each with its own rules= each rope jumping game with its rules.
it 就是指前面的each rope jumping game