Critical Reasoning

We can eliminate A, E immediately becouse these are not related to this argument and so contender are B C D.

Here I confused about some, most and many as mentioned in B C D.

According to me some means few so it is different than many or most. So, B can not be the answer. becouse stimulus states many environmentalists claims.
And may be most and many both are different .
Can you pls explain me the difference between most & many according to this argument.

What can be the correct answer among B C D and why ?

Thanks
Sarwan
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