Sentence Correction

The jazz band's music transcends generational barriers by attracting people of all ages,with the fusing of both modern funk and Dixieland styles
a. with the fusing of both modern funk and Dixieland styles
b. in that it fuses both modern funk and Dixieland styles
c. for it fuses both modern funk and Dixieland styles
d. when they fuse both modern funk and Dixieland styles
e. by the fusion that is of both modern funk and Dixieland styles

[spoiler]OA:E[/spoiler]
Guys pls explain in detail

I feel when we talk about music we can only use the word 'fusion' .