Who is to blame for the secret coming out in season 1?

1 I blame Miss Chatham because she couldn't stop talking about the treasure which almost resulted in Zane discovering Rikki and Emma because the two saved Zane from drowning

2 Rikki in the last episode could have been careful not to mention the scientist in front of Zane

3 Lewis Lewis absolutely had to do all the experiments on Cleo Rikki and Emma, ​​which led to the scientist finding out about them