This question has a 5-star difficulty but it looks like there's no explanation video on this.
What is everyone's thought process on this question. Here's my reasoning for why it comes down to C and D :
The conclusion is "by using recycled glasses instead of glass made from raw materials, bottlers can lower their costs and benefit the environment at the same time."
Can someone explain why C is right? I initially chose D and can now see why D isn't necessarily true for Passage B, but I can't figure out why C applies to Passage B.