there is no right answer to that.
sometimes doing one thing is the right choice and sometimes doing the other is the right choice.
many/most/all (?) of these island events are designed without a correct answer.
i have had the same event in different tribes, and picked the same answer each time, and sometimes the result was a benefit and sometimes it was not.
only Arthur can tell us if there are there any island events with a definite right answer and a definite wrong answer.