And I have one more question...
The government predicts that, for consumers and businesses that make a large number of long-distance calls, the Federal communication's recent telephone rate cuts will greatly reduce costs, though some consumer groups disagree with the government's estimates, suggesting they are too optimistic.
what does the rest part of this sentence mean? (,though some...to optimistic)
I thought "suggesting they are too optimistic" is a adverbial modifier that modifies the verb disagree. and it should mean " some consumers suggest government are too optimistic". But how can "they" refers to the singular "government’?