What change should be made to the sentence when editing for correct comma usage? After studying for an hour I decided to go outside and get some fresh air. Select one:

O No change necessary.

O Aſter studying for an hour I decided to go outside, and get some fresh air.

O After studying, for an hour, I decided to go outside and get some fresh air.

O After studying for an hour, I decided to go outside and get some fresh air.​