Question

To whom is Roger Chillingworth compared in Chapter 9 of The Scarlet Letter? A. An angel B. God C. A saint D. The Devil

Answer 1

I believe the answer would be C. A Saint. 
From the book "The Scarlet Letter"
This learned stranger was exemplary, as regarded at least the outward forms of a religious life, and, early after his arrival, had chosen for his spiritual guide the Reverend Mr.Dimmesdale. The young divine, whose scholar-like renown still lived in Oxford, was considered by his more fervent admirers as little less as a heaven-ordained apostle, destined, should he live and labor for the ordinary term of life, to do as great deeds for the now feeble New England Church, as the early Fathers had achieved for the infancy of the Christian faith.
My fingers are sore, I hope it helps! :P

Answer 2

The answer is d. here is the reason    

The townspeople were initially grateful for Chillingworth’s presence and deemed his arrival a divine miracle designed to help Dimmesdale. As time has passed, however, rumors have spread concerning Chillingworth’s personal history. Even more ominously, the man’s face has begun to take on a look of evil. A majority of the townspeople begin to suspect that Chillingworth is the Devil, come to wage battle for Dimmesdale’s soul.