puneet478 wrote:
Assumption 'A' proves the importance of micro-organisms which are important for environment. Premises show that their importance is ignored and hence the campaign will not be successful.
In other words,
Author is assuming that micro-organism are important contributor (micro-organism)and since they are not cared for (sympathized), the campaign will be a failure.
Hope it clarifies.
==> The negation of the choice A is "The most important environmental problem includes only the large
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