Cumberland Gap -- Chord Progression

A 
D (I) - D (I) - D (I)  - G (IV)
D (I) - D (I) - A (V) -  D (I)
D (I) - D (I) - D (I)  - G (IV)
D (I) - D (I) - A (V)  - D (I)

B 
A (V)  - A (V)  - A (V)  - G (IV)
G (IV) - G (IV) - G (IV) - G (IV)
A (V)  - A (V)  - A (V)  - G (IV)
G (IV) - G (IV) - A (V)  - D (I)

C 
D (I) - D (I) - G (IV) - G (IV)
D (I) - D (I) - G (IV) - G (IV)
D (I) - D (I) - A (V)  - D (I)