Question

Which sentence BEST combines the ideas shown below?
A.The football player did not seem seriously injured. As a precaution, the trainers moved him carefully.
B.The football player did not seem seriously injured, and as a precaution, the trainers moved him carefully.
C.The football player did not seem seriously injured, for as a precaution, the trainers moved him carefully.
(What I think the answer is)D.The football player did not seem seriously injured, yet as a precaution, the trainers moved him carefully.

Thank you for your help