Which sentence combines these two sentences through the use of an appositive?

Dorothy is a colonel in the U.S. Army. Dorothy has received a medal for her service.

Responses

Dorothy has received a medal for her service as a colonel in the U.S. Army.
Dorothy has received a medal for her service as a colonel in the U.S. Army.

Dorothy, a colonel in the U.S. Army, has received a medal for her service.
Dorothy, a colonel in the U.S. Army, has received a medal for her service.

The U.S. Army has given Dorothy a medal for her service as a colonel.
The U.S. Army has given Dorothy a medal for her service as a colonel.

Dorothy is a colonel in the U.S. Army, and she has received a medal for her service.

Dorothy, a colonel in the U.S. Army, has received a medal for her service.