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bradye
Hi there!

The best answer will be the last one, combining 2 grams of copper and 4 grams of sulfur to make 6 grams of copper sulfate.

None of the previous ones really demonstrate the law in a clear manner.

Brady
The answer would be 
D. Combining 2 grams of copper and 4 grams of sulfur to make 6 grams of copper sulfate
Hope this helped!
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