The test has already been written, teachers have reviewed the questions thoroughly, it is too late to make changes now. What is the best way to revise the comma splices in this sentence?
A.
The test has already been written, so teachers have reviewed the questions. Thoroughly it is too late, and to make changes now.
B.
The test has already been written, teachers. Have reviewed, the questions thoroughly. It is too late to make changes now.
C.
The test has already been written, and teachers have reviewed. The questions thoroughly, it is too late to make changes now.
D.
The test has already been written, and teachers have reviewed the questions thoroughly, so it is too late to make changes now.