The subordinate clause is : " which had been dumped into the city water system "
<span>for 17 the third on is wrong because of the punctuation. 19 i believe the correct answer is the 2nd one, for 18 it is the first one and finally for 20 it is the 4th one because the semicolon joins two independent clauses. Hope this helps!</span>
ok... whats the question here? if there is a question for it, i would be happy to help you as best as i can.
Answer:
He wants the reader to know that it is them doing that part
Explanation: