Answer:
First degree murder
Step-by-step explanation:
Mrs. Kline finds out that her husband is having an affair with her best friend. Mrs. Kline waits outside the woman's home and after everyone has left for school and work, she knocks on the door. The woman answers the door and is surprised but seems happy to see Mrs. Kline. Mrs. Kline is invited in and once inside, she strangles the woman, killing her. What crime has Mrs. Kline committed? First degree murder because the unlawful killing committed here is both willful and premeditated, in other words she had planned to do it