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 man begged for forgiveness, so he didn't have to think about it
not plausible

The boy turned the lid on the jar, so he couldn't see what was going on
not plausible

The boy murmured his reply to his mother, so she didn't have to worry about it

not plausible