Grand Lake is located high in the Rocky Mountains. It is a charming town.

Which sentence combines the two sentences by inserting a phrase?

A. Grand Lake is located high in the Rocky Mountains; it is a charming town
B. Grand Lake, a charming town, is located high in the Rocky Mountains
C. Grand Lake is located high in the Rocky Mountains where it is a charming town.
D. Grand Lake is located high in the Rocky Mountains, and it is a charming town.