The managers of these companies are not deliberately
wasteful; they are simply unaware of all their alternatives
因为前面一直在说dump对公司的好处，for the managers, the most important thing is the benifits of their companies! thus, the side-product of dumping is "not deliberately wast". here, ";" is very important i think. it somewhat means "while". in D, are unawqre of the needs of those people who would find the products useful. 没有意识到public的需求是不对的。因为原文说not deliberately，就是说dumping不是故意的，是因为为了公司的利益，他们没有别的办法，毕竟dumping 有很多好处 | 
