The correct answer is option letter D (The football player did not seem seriously injured, yet as a precaution, the trainers moved him carefully). This sentence explains that even though the football player suffered a slight injury, the trainers took precautions to move him carefully. Option letter D best combines the ideas using the conjunction “<u>as</u>” to connect the result of something with its reason and the conjunction “<u>yet</u>” meaning ‘but’ or ‘<em>nevertheless</em>’ (the player was not seriously injured, <u>BUT</u> the trainers took precaution to move him carefully). The rest of the options (A, B, and C) do not clearly develop the relation between the two ideas mentioned before.
I think the sentence that combines the idea is : D. the football player did not seem seriously injured, yet as a precaution, the trainers moved him carefully This sentence combined 2 separate occurrences into one sentence correctly