What is the most effective revision to make in sentence 15? "Soon Foley was working to make films more realistic and by improving the background sounds with moviemakers"
F. Soon Foley was working to make films more realistic as he was improving the background sound with moviemakers.
G. Soon Foley was working with moviemakers to make more realistic films by improving the background sounds.
H. Soon Foley was working to improve the background sound with moviemakers and to make films more realistic.
D. Soon Foley was working to make more realistic films by improving the moviemakers and background sounds.