<span>A. The following morning, Erika acted strangely to distract Mr. Kelp. </span>
The irony is that the "nice" mom---Laurie's mom---is the one with the badly-behaved son. She just doesn't realize at first that Charles and Laurie are the same person. Again, the irony is that she believes only a bad mother would have such a bad kid, but HER own son turns out to be the bad kid.
I believe the answer is D, because "author and you" questions typically make you have to use information that isn't directly said in the passage.
<span>The correct answer is that he expresses regret for his previous behaviours. The expression of regret heard in his prayer about the murder of his brother underlines the complexity of his character, as although this was an act that seemed at first as if it was all he desired, we later learn that the character is not implicitly evil and is able to feel regret.</span>