Please help me i will mark brainleist Refer to the Newsela article “PRO/CON: Can Eating Less Meat Cool the Climate?”

Why does the author of the argument against eating less meat think that reducing meat consumption will not make a difference?

A. The demands made by anti-meat activists are unreasonable.
B. Meat is essential to a healthy diet, and people enjoy it.
C. Plant-based agriculture uses more resources than livestock farming.
D. No solid research has concluded that livestock farming is not sustainable.