A construction company needs to select a rock material for making roof tiles that is hard and long lasting. Based on the information provided, which metamorphic rock would be most suitable for this purpose?
1 )
Marble, because it is extremely hard and very shiny
Slate, because it is hard, long-lasting, and forms thin layers
3 )
Quartzite, because it is much harder than sandstone
4 )
Gneiss, because it is very hard and has a banded appearance
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