Which of the sentences below contains a mixed construction error? (Which sentence is Incorrect?)


Missing for over a week during a terrible winter storm, but Taygen's cat came back looking healthy and well fed.

Even though it was missing for over a week during a terrible winter storm, but Taygen's cat came back looking healthy and well fed.

Both A and B contain a mixed construction error. (Both are incorrect.)

Neither A nor B contains a mixed construction error. (Both are correct.)