Supernatural was Nirvana's breakthrough album of 1991

Which of the following is a true statement about this work?

a) solo passages alternate with choral and instrumental sections b) it features block homophony exclusively c) it builds to stirring conclusion featuring antiphonal exchange d) it features a slow but steady increase in register, rhythmic motion, and melodic intensity

The invention that greatly aided in the distribution of manuscripts during the Early Roman Empire was the ____

a. Column of Trajan b. codex c. triumphal arch d. diptych