ko cần gải thích The manufacturers put too much packaging on the things they produce, it is really wasteful. A. If the manufacturers put too much packaging on the things they produce it will be less wasteful. B. If the manufacturers don't put too much packaging on the things they produce, it will be more wasteful. C. If the manufacturers don't put too much packaging on the things they produce, it will be less wasteful. · D. Unless the manufacturers put too much packaging on the things they produce, it will be more wasteful.