I know for number one it's Dear, Mrs. Lamont, since it's a name so the comma goes before it. I'm sorry if I'm wrong
Honestly, all of them can. I would select them all. Context is the only one that’s iffy, but context is also important because words can have connotative meanings that alter their meaning and tone.
Answer:
When Mary returns home you hide for dear life.
Explanation:
If she catches you, you are dead.
