Answer :
The Union benefited from holding Maryland because D) the Union capital was not surrounded by hostile territory.
Answer:
D.) the union capital was not surrounded by hostile territory
Explanation:
Maryland was a slave state which never left the Union. Along with Kentucky, Missouri, Delaware, and West Virginia, it became known as a border state. Maryland was unique because of its location. Washington, D.C., was bordered on one side by Virginia. On the other three sides, it was bordered by Maryland. Virginia seceded in 1861. If Maryland had followed, the Union capital would have been surrounded by Confederate states.