In this task, you will be given two sentences separated by ", so". You should decide whether the first sentence can be the cause of the second sentence. If you can see a possible causation, answer with "plausible", otherwise answer with "not plausible".

I was confused by the professor's lecture, so I looked it up on the internet
plausible

The woman won the lottery, so she was a happy girl
plausible

I rubbed the soap between my hands, so in order to get rid of some of the dirt

plausible