Question

Which sentence contains a linking verb?

Ulysses S. Grant, the Union general, helped the North win the Civil War.
The battle of Antietam changed Union policy regarding participation in the war.
Abraham Lincoln, a famous president during the Civil War, held a consistent view of an undivided Union.
As the war progressed, General Robert E. Lee became increasingly concerned about invading the North.

Answer 1

I think the answer is D. As the war progressed, General Robert E. Lee became increasingly concerned about invading the North.

Step-by-step explanation:

I think the linking verb here is became. I hope this helps!