In the Dinner Scene in Shadow of a Doubt in Which

In the dinner scene in Shadow of a Doubt in which Uncle Charlie praises small-town living, what purpose does the dialogue serve?

A) informational, mostly to orient the audience as to the current events in the town to which Little Charlie has moved
B) to strengthen the audience's and Little Charlie's suspicions that the uncle is a murderer
C) to strengthen the audience's suspicions that the uncle is a murderer while keeping Little Charlie in the dark
D) to confuse the audience as to the true motives of the principal characters, especially Little Charlie