Could you rephrase you question to create a clearer understanding .
The answer is B: Less than a decade ago, the HSUS...an affiliate [Human Society International].
Brackets are used to give the writers (when they need to add information) an opportunity to add an explanation, or emphasis to a word, or change a <em>quote to fit to a sentence, but without changing the meaning of the text</em>. In A) <em>global work</em> doesn't need explanation; C) <em>decade</em> doesn't need explanation; D) <em>HSUS</em> was already explained in the first sentence of the text.
Second person is a point of view (how a story is told) where the narrator tells the story to another character using the word 'you. ' The author could be talking to the audience, which we could tell by the use of 'you,' 'you're,' and 'your.
Answer:
4. Should be studying
Explanation:
The predicate is the part of a sentence (or clause) that contains a verb, stating what the subject is doing, or describes the subject.
When we have a main verb and an auxiliary verb accompanying it, both of them together form the predicate. In the given sentence, we have a construction with a main verb<em> to study </em>and an auxiliary verb <em>should:</em> <em>should be studying</em>. If you chose just<em> studying</em> or <em>should be</em> as the predicate, that would be incorrect as those two options are not the complete predicate.