A) Leaves out a comma before Walt (i.e. this weekend, Walt?)
B) Is not a direct sentence. The speaker is not talking to Abraham Lincoln; she/he is only talking about him.
C) Uses the comma correctly in a direct address. The speaker is saying something directly to Denise and there is a comma directly after her name.
D) Again, the speaker may not be talking directly to the boys but simply to the parents of said boys.
I hope this helps!!
It forces the listener to accept there is not one expected answer. It makes the sermon seem directed at the listener personally.It makes the listener think about their actions.
The answer is B, according to a top notch website with .org ending the URL