+1 for D
In B,we don't care whether the amount of glass currently recycled each year is enough to supply.As long as,the bottlers can make a large percentage of their bottles from recycled glass,they still benefit from the cost saving.On the other hand,if the additional costs,i.e. purchasing and transport costs,commensurate the saving cost,the bottler will not at all benefit from the cost-saving from the recycling process.
In B,we don't care whether the amount of glass currently recycled each year is enough to supply.As long as,the bottlers can make a large percentage of their bottles from recycled glass,they still benefit from the cost saving.On the other hand,if the additional costs,i.e. purchasing and transport costs,commensurate the saving cost,the bottler will not at all benefit from the cost-saving from the recycling process.
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