In an Isothermal Process Where the Pressure Decreases from

In an isothermal process where the pressure decreases from to , does the internal energy of the system increase, decrease, or stay the same; and does the entropy of the system increase or decrease?

A) The internal energy decreases and the entropy increases.
B) The internal energy stays the same and the entropy increases.
C) The internal energy decreases and the entropy decreases.
D) The internal energy stays the same and the entropy decreases.