大全15!HELP!

大全15.        A new phenomena, which is visible at Managua’s major intersections, are waves of vendors and beggars, which include many children and mob cars at the stoplights.

(A) A new phenomena, which is visible at Managua’s major intersections, are waves of vendors and beggars, which include many children and

(B) Visible at Managua’s major intersections are waves of vendors and beggars with many children, new phenomena that

(C) A new phenomenon visible at Managua’s major intersections is waves of vendors and beggars, many of them children, who

(D) Phenomenally new waves of vendors, beggars, and many children are visible at Managua’s major intersections, which（C）

   (E) A wave of vendors and beggars, many of whom are children, are visible at             Managua’s major intersections, where they are a new pheno

想问一下，
答案C
(C) A new phenomenon visible at Managua’s major intersections is waves of vendors and beggars, many of them children, who
首先，is waves会不会不平衡呢？
因为动词is为单数，可是waves却是复数。
另外， ,many of them children, who这样很容易让人以为who是代children~
请问各位大大怎样破解这题呢？

感恩阿~

C. 主语是 A new phenomenon, is 和 weaves 无关。

many of them 是 vendors and beggars同位语， who 修饰vendors and beggars.

不好意思!我还是不懂

不是S is O

不是要be平衡吗!谢谢

many of them children

这个是什么意思，同位语吗？