Please explain how once can derive the answer for this passage's primary goal question?

Which of the following best represents the author's primary goal in writing the passage?
to outline a theory and suggest options for further research

to act as an advocate for additional research to help elucidate a particular theory's validity

to introduce a theoretical construct that has not yet been sufficiently proven

to demonstrate the complexities involved in conducting a certain type of scientific research

to articulate a hypothesis and lay out the case for proving it

Hi, we need the text of the passage itself. Is this from the CAT or is it printed in the strategy guide? If from the CAT, try copying and pasting the text (you may have to do this paragraph by paragraph). If in the strategy guide, please type the first two sentences of each paragraph and we'll see if we can do it that way, rather than having you type in the whole thing.