The diagram below shows the structures of two carbon allotropes: graphene and buckminsterfullerene (C60C_{60}C60).
Which row in the table correctly compares the structure, electrical conductivity, and relative melting/sublimation points of these two allotropes?
Graphene: Giant covalent structure ∙\bullet∙ Excellent electrical conductor ∙\bullet∙ High melting point
Buckminsterfullerene (C60C_{60}C60): Simple molecular structure ∙\bullet∙ Poor bulk electrical conductor ∙\bullet∙ Low melting/sublimation point
Graphene: Simple molecular structure ∙\bullet∙ Poor electrical conductor ∙\bullet∙ Low melting point
Buckminsterfullerene (C60C_{60}C60): Giant covalent structure ∙\bullet∙ Excellent electrical conductor ∙\bullet∙ High melting/sublimation point
Graphene: Giant covalent structure ∙\bullet∙ Poor electrical conductor ∙\bullet∙ High melting point
Buckminsterfullerene (C60C_{60}C60): Simple molecular structure ∙\bullet∙ Excellent bulk electrical conductor ∙\bullet∙ Low melting/sublimation point
Graphene: Simple molecular structure ∙\bullet∙ Excellent electrical conductor ∙\bullet∙ High melting point
Buckminsterfullerene (C60C_{60}C60): Giant covalent structure ∙\bullet∙ Poor bulk electrical conductor ∙\bullet∙ Low melting/sublimation point