How do you kill mabel Henderson in fallout 3

One Of...

1: Rig The chandelier above the hallway (When She walks under it falls)
2: Sabotage The Oven (Take The Pilot Light) And Then Ask her to make you a pie
3: Go To The Security Console in the kitchen Then "Enable Security Lock down"
,"Begin Security Program" And disable the "security parameters" (I Think)