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For what purpose is the mineral corundum commonly used?
O A. To make pencils
O B. To make false teeth
O C. To make emery boards
O D. To make drinking glasses

Respuesta :

thivinyabasnayaka

Answer:

D I guess because grinding optical glass and for polishing metals and has also been made into sandpapers and grinding wheels.

jnegron1736

Answer:

It's to make emery boards

Explanation:

I just took the test

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