I gave some to Wakaba earlier . " The scientist explained then began twirling his hair around his finger . " Speechless ? Of course you would be . " He explained still twirling his hair around a slim digit . It was those words that kick started Tatsumi 's brain again .

Q with options: Give answer the following question using evidence from the above passage: What may be the reason a few words triggers someone like that ?
Options are:
*None of the above choices .
*It 's been implanted in their brain .
*It 's something that happens to someone with scientists .
*It 's due to past experiences .
It 's due to past experiences .