I believe is is OA. Apologies if it is wrong.
Answer:
B.) Admittedly, we cannot reuse or recycle all of the materials we use in our daily lives.
and
D.) My opponent would use these limitations of our ability to recycle to counter my points about the materials we can recycle.
Both these sentences are countering the speaker's claim.
This can’t be answered because we do not know what u are referring to
Answer:
Take the last muffin; it's yours, not mine.
or
Take the last muffin. It's yours, not mine.
Explanation: