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".

The teacher took roll, so she gave her students a pop quiz
not plausible

I stood on one foot, so causing him to stumble
not plausible

It got dark outside, so made it harder for me

plausible