Answer: C) subordinating conjunction.
Explanation: a subordinating conjunction is a word that joins a dependent or subordinate clause (a phrase that doesn't have complete meaning on its own) with an independent clause (it has complete meaning on its own). There are subordinating conjunctions that show a relationship between two clauses involving a transition of time or place. In this case, "after" is a subordinating conjunction joining the independent clause "Mrs. Jenkins thanked them gratefully" and the subordinate clause "After the police came to her rescue."
The outcome of Macbeth's conflict with Banquo and Fleance is that Macbeth tries to have them both murdered, but Fleance escapes. In Act III, Scene iv, as the murderers are trying to complete their task, one says "There's but one down, the son is fled". This shows that Banquo has been successfully killed but Fleance has escaped.
