Hello Tutors

First of all, tons of thanks for your help.

I am having a hard time eliminating option D.
Does gradual enough not to X change the meaning of the original question? if so could you explain how it differs in meaning from original question?

Regards,
Ravi Kumar

Q. Federal authorities involved in the investigation have found the local witnesses are difficult to locate, reticent, and are suspicious of strangers. A. the local witnesses are difficult to locate, reticent, and are B. local witnesses to be difficult to locate, reticent, and are C. that local wit...

after "found" that makes sense but that doesn't mean that rest of the sentence will be correct :)

My question is with choice C especially in the parallelism part of it :)

Thanks,
Ravi Kumar

Thanks for correcting...:)

Still It doesn't solve my problem. how can
to locate (to + verb form)
parallel to
to reticent and
to suspicious of strangers(which are in to+adjective form)

Ravi Kumar

Thanks :D

I get it now. I got misled by previous post.

Ravi Kumar