[EFOMM 2011] Mark the option in which the idea e...

Mark the option in which the idea expressed by the highlighted conjunction is correctly explained in parenthesis.

She stared at me as if I were a complete stranger. (condition)

While she was asleep, thieves broke in and stole her - handbag. (time)

I cannot tell whether she is old or young, for I have never seen her. (result)

I was feeling hungry, so I made myself a sandwich (reason)

Unless they get protection, they will not testify. (purpose)