Identify the choice that uses one or more transitions correctly.
A.
We all thought we had sent out all the invitations to the debate. We suddenly had a big problem.
B.
We all thought we had sent out all the invitations to the debate; we suddenly had a big problem.
C.
We all thought we had sent out all the invitations to the debate. We were wrong; we suddenly had a big problem.
D.
We all thought we had sent out all the invitations to the debate; instead, we suddenly had a big problem.