Opening a Tissue Box

“I think you’re about to sneeze! So make sure to use a tissue,” said Michal to her brother Chaim as she ran to get the tissue box.

When she got the tissue box, she realized that it was not opened before Shabbos.

“Hmm...what do we do?” asked Michal, “We did not make the hole on top of the box before Shabbos!”

“We’re throwing out the box anyway after all the tissues are gone. So why not just make the hole on the top — like usual?” asked Chaim.

“I think making a hole on the top is a problem. Let’s make a hole on the bottom,” proposed their sister Leah.

Michal waived her head in disapproval and said, “I think the only way we can take the tissues out is if we destroy the box!”

Question: Who proposed the right solution: Michal, Chaim or Leah?