The volume of a gas is 3.0 L, the pressure is 1.0 atm, and the temperature is 300 K. A chemist changes one factor while keeping another constant so...

The volume of a gas is 3.0 L, the pressure is 1.0 atm, and the temperature is 300 K. A chemist changes one factor while keeping another constant so that the new volume is 2.0 L. Which of the following could be the new conditions?

 The final pressure is 0.5 atm, while temperature is kept constant.

 The final temperature is 200 K, while pressure remains constant.

 The final pressure is 0.2 atm, while temperature is kept constant.

 The final temperature is 350 K, while pressure remains constant.