What changes should be made to correct this sentence in the third paragraph?
This can happen when you get sleepy this is because of all the gasses you're breathing in,
OA.
This can happen when you get sleepy, this is because of all the gasses you're breathing in,
OB. This can happen, when, you get sleepy this is because of all the gasses you're breathing in,
OC. This can happen when you get sleepy this is, because of all the gasses your breathing in,
OD
This can happen when you get sleepy because of all the gasses you're breathing in.