What is the reason for the deviation of pressure from ideal behavior?

• A
  Molecular interactions between molecules and $\frac{PV}{nRT} > 1$
• B
  Molecular interactions between molecules and $\frac{PV}{nRT} < 1$
• C
  Negligible volume of molecules and $\frac{PV}{nRT} > 1$
• D
  Negligible volume of molecules and $\frac{PV}{nRT} < 1$