I would say C. “was”. It’s definitely not “am”, because that just sounds completely wrong. It’s not “are” because that sounds a bit wrong, too. It can’t be “were” because it’s only referring to one group, not many groups. The only answer it could be is C.
On the macro scale, social structure<span> is the system of socioeconomic stratification </span><span>, </span>social<span> institutions, or, other patterned relations between large </span>social<span> groups. On the meso scale, it is the </span>structure<span> of </span>social<span> network ties between individuals or organizations.</span>
In the case of this sentence we have an example of a <em>Passive Voice Sentence: </em>
<h2>The Hawaiian Islands are also known for their lush, exotic scenery</h2>
In which the <u>verb phrase</u> is are also known. “Also” in this case is just an adverb modifying the verb phrase. This last is compounded by the verb <em>To Be</em> in the present form and the perfective form of the main verb (know).
On the other hand, in this example of the passive, the <u>Subject Phrase</u> is The Hawaiian Islands which are the recipients of the action performed in the Verb Phrase by an unknown/covert agent which is not mentioned in this sentence.
Answer:
What poem are you referring to?
Explanation: