What would happen to a nucleus containing two or more protons if the strong force was absent?

The positively charged protons would repel one another and fly apart, destroying the nucleus.

The answer to your question would be c. mineral oil  

Answerδh > 0explanationc₆h₆  (s)  → c₆h₆ (l)if you are changing it from a solid to a liquid, you are pretty much melting the solid. this requires heat energy. therefore, the reaction is endothermic (takes in energy); the system enthalpy increases as the reaction proceeds: δh > 0.