Select the most appropriate option to substitute the bracketed segment in the given sentence. If there is no need to substitute it, select 'no substitution required'.
(Democrats control neither Congress and neither the White House, but) they are doing their best to control the judicial processes.

A

Democrat controls neither Congress and nor the White House, though

B

No substitution required

C

Democrats control neither Congress nor the White House, but

D

Democrats control neither Congress or the White House, but