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.