In the sentence that reads "I had began to study for the test by five o'clock", the person used the wrong participle "began". Because this is the <em>perfect past</em> (indicated by the word "had"), we must use the past participle of the verb.
The verb here is "begin", and its past participle is "begun". So the sentence should say "I had begun to study for the test by five o'clock".
I think the correct answer from the choices listed above is the third option. The christian theme of uncle tom’s cabin comes closest to reflecting the power of emotion over logic which a common trait of american romanticism. Hope this answers the question. Have a nice day.