An Ideal Gas (The System) Is Contained in a Flexible $\degree$

An ideal gas (the system) is contained in a flexible balloon at a pressure of 1 atm and is initially at a temperature of 20. $\degree$ C. The surrounding air is at the same pressure, but its temperature is 25 $\degree$ C. When the system has equilibrated with its surroundings, both systems and surroundings are at 25 $\degree$ C and 1 atm. In changing from the initial to the final state, which one of the following relationships regarding the system is correct?

A) ( $\Delta$ E < 0)
B) ( $\Delta$ E = 0)
C) ( $\Delta$ H = 0)
D) w > 0
E) q > 0