Find the part of the sentence that contains an error:
Much of what appears to be coordination (1) / among the regulatory bodies and private stakeholders (2) / are, in fact, coincidental overlaps (3) / caused by differing mandates (4).

Correct option is C

Option (c) (3) contains an error.
The subject is “Much of what appears to be coordination…”. Here, much (referring to an uncountable idea/amount) is treated as singular, so the verb should also be singular: is, not are. Therefore, the incorrect part is “are, in fact, coincidental overlaps”; it should be “is, in fact, a coincidental overlap” (or restructure it to keep plural sense consistently).
Correct form (one acceptable correction):
· Much of what appears to be coordination among the regulatory bodies and private stakeholders is , in fact, coincidental overlap caused by differing mandates.
Grammatical rule used:
· Subject–verb agreement:
· Much / little / each / every / what + clause usually takes a singular verb when referring to an uncountable idea or whole clause as the subject.
· A verb must agree with the true subject, not with a nearby plural noun inside a phrase.
Example: Much of the information is inaccurate.
Information booster / exception:
· If you intentionally make the subject plural, then plural verb is correct: Many of the overlaps are coincidental.
· But with “Much of what…”, the standard agreement is singular ( is).