Hard Why can hardness alone be insufficient for an impact-loaded insulator? AHardness does not guarantee toughness or impact resistance BHardness always guarantees toughness CImpact resistance depends only on conductivity DHard materials have no electrons EImpact resistance depends only on density Report a problem with this question What is wrong? The marked correct answer is wrongAn option is wrong or repeatedSpelling or wording mistakeSomething else Details (optional) Send report