Formulate chord sequences to heighten the harmonic quality of the specified musical portion.
A |: df | g2 f2 ec | B2"^c/A" c2 BF | A2 B2 d>c | d3 A df | 
 g2 f2 ec | B2 c2 BF | A2 B2 dc | (d2 d2) df | a3 a bg | 
 e2 e2 fa | (b2 b2) af | a3 g fe | d2 a2 fd | B2 cd fd | 
 A2 B2 dc | (d2 d2) :|  
X:1
L:1/8
M:3/4
K:D
 A |: df |"G/D" g2"D" f2 ec |"G/D" B2"^c/A" c2 BF |"D" A2"G/D" B2 d>c |"D" d3 A df | 
"G/D" g2"D" f2 ec |"G/D" B2"A/D" c2 BF |"D" A2 B2 dc | (d2 d2) df |"D" a3 a"G" bg | 
"A" e2 e2"D7/F" fa |"G" (b2 b2)"D/F" af |"E7/A" a3 g fe |"D/F" d2"D" a2"D7" fd |"G" B2 cd"D/F" fd | 
"Dsus4/A" A2"G/A" B2 dc |"D" (d2 d2) :|  