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 baby was wailing in his crib, so he got up and opened the door
not plausible

The bureau drawers were cluttered, so I didn't worry about it
not plausible

The boaters set off a flare, so we didn't have to wait long

plausible