tangobob said:The subject of the sentance is a multitude not opportunities. Now if it were; Opportunities are unfolding that are multiple. Then opportunities would be the subject and "are would be the right word to use.
The subject of the sentance is what we are talking about.. In this case opportunities.. We are not talking about multitudes !!
We have 2 nouns here (multitude and opportunities), but one of the nouns is describing the other which makes it act as an adjective and always comes first, and if there is a plural it is the real noun..
So in this case the multitude is the noun acting as an adjective and the opportunities is the noun - and the subject.