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'.

He suggested (there was conclusions through objectors, due to similarities) in some letters sent to the council.

A

there was conclusions from the objector, due to similarities

B

there was collusion between the objectors, due to similarities

C

No substitution required

D

their was collusion by the objectors, due to similarities