The appositive phrase defines the term asterism. It tells the reader that an asterism is an "informal constellation name".
Appositive phrases are often surrounded by commas. They follow a noun and rename or describe it. Another example is "My dog, a yellow lab, loves to play ball." In this sentence the appositive phrase is "a yellow lab". It describes the noun - dog using a noun - lab.
The question is asking to state how would colonists react to Edward Sermon, base on my research and further investigation, the possible answer would be Rev. Jonathan Edwards delivered the execution sermon "Sinners in the Hands of an Angry God" in Enfield, Connecticut on July 8, 1741. This execution sermon is a lurid and bitter jeremiad against the "New York Negro rebels" who were then being hanged and burned at the stake for a suspected plot to destroy the village of New York by arson fire.
A, mainly because she has a hopeful tone in the sentence trust me that’s the answer