It was Much quieter. The reason this is true is because if you were to say it is more quieter, it wouldn't make sense. It would make more sense to say it was more quiet.
When talking about recycling, people don't seem to consider the recycling of clothing.
The comma should be placed between the first use of recycling and people. The subordinate clause is "when talking about recycling". This is a clause because of the word "when". When makes the reader wonder when what? The main clause is "people don't seem to consider the recycling of clothing."
The answer is B. Scarlett