I believe the correct answer is naive.
The author is trying to say that he was ignorant, and that he couldn't understand properly these new revelations. He was either too young or too stupid to understand such a thing, but he believes he will as he grows older.
<span>A subordinate clause is a group of words with a subject
and a verb. It basically begins with subordinating conjunctions or relative
pronouns. As the name suggests, it cannot stand alone so it needs an
independent clause to convey a complete thought.</span>
U.S. immigration law is very complex, and there is much confusion as to how it works. The Immigration and Naturalization Act (INA), the body of law governing current immigration policy, provides for an annual worldwide limit of 675,000 permanent immigrants, with certain exceptions for close family members.
