Which of the Pieces of Evidence Would Point to a Classic

Which of the pieces of evidence would point to a classic "heat of passion" voluntary manslaughter charge?

A) The wife was aware of the affair and expected the couple to be in the bedroom at that time; she had purchased a gun the previous day in anticipation of walking in on them.
B) The wife was completely unaware of the affair until the moment she entered her bedroom, where a loaded gun lay on a nearby table.
C) The husband had a $1,000,000 insurance policy taken out on his wife.
D) The gun used in the killing was on a nightstand near the bed, and was already loaded when the wife picked it up.