Knowledge that has been lost
The subordinate clause is : " which had been dumped into the city water system "
"Essay on MY best teacher" We do not know your teachers and you did not provide any valid information on them, nobody can help without more data and you should be doing this alone because we dont know them.
Answer:
A
Explanation:
I would choose option A because it counters Cameron's claim, and then gives a reasonable explanation behind the counterclaim.