IMO C.
a. All the paper used by the organization for purposes other than mailings is recycled.Out of scope
b. The mailings from the organization's national headquarters always use envelopes that have windows.Out of scope
c. The envelope windows made from recycled material are recyclable.Correct. We have to justify that the envelopes are recyclable. We are told that they are made from paper which is recyclable and the only thing missing is to know whether the windows are recyclable too.
d. The
...
a. All the paper used by the organization for purposes other than mailings is recycled.Out of scope
b. The mailings from the organization's national headquarters always use envelopes that have windows.Out of scope
c. The envelope windows made from recycled material are recyclable.Correct. We have to justify that the envelopes are recyclable. We are told that they are made from paper which is recyclable and the only thing missing is to know whether the windows are recyclable too.
d. The
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