Although aspirin irritates the stomach, it can be avoided if the aspirin tablet is given a coating that will not dissolve until the tablet reaches the intestine.
(A) Although aspirin irritates the stomach, it
(B) The irritation of the stomach caused by aspirin
(C) The fact that aspirin causes irritation of the stomach
(D) Aspirin causes stomach irritation, although it（B）
(E) Aspirin irritates the stomach, which
请问这里是n1 of n2+过去分词组成的一个定语结构，按照逻辑意思，这里的过去分词是指代n1的，可是我总觉得过去分词之前没有逗号是修饰就近的啊。。假设，n1 of n2 that+谓语，那这个谓语的单复数跟哪个？谢谢
The speculative fever of the Roaring Twenties infected rich and poor alike; vast quantities of people were dangerously overextended, credit was absurdly easy to obtain, and most brokerage houses required only ten percent cash for stocks bought on “margin.”(P2 F-2)
(A) rich and poor alike; vast quantities of people were dangerously overextended
(B) both rich and poor alike; large amounts of people dangerously overextended themselves
(C) rich and poor alike; great numbers of people were dangerously overextended
(D) both rich and poor alike; vast amounts of people dangerously overextended themselves（C）
(E) both rich and poor; great quantities of people were dangerously overextended
至于这题，请问这里的quantities of可以修饰可数名词，那么就近A C和E怎么区别？ | 
